Grilled Zucchini & Summer Squash: The Ultimate Easy Summer Side

As the days grow longer and the sun shines brighter, there’s nothing quite like the taste of fresh, seasonal produce. And when it comes to summer vegetables, grilled zucchini and summer squash stand out as absolute champions. They are incredibly versatile, packed with flavor, and perhaps best of all, incredibly easy to prepare. This recipe transforms humble zucchini and summer squash into a show-stopping side dish, perfect for any backyard barbecue, weeknight meal, or elegant gathering. Forget bland, watery vegetables – we’re talking about perfectly tender, subtly charred slices bursting with a savory-sweet essence, elevated by a simple drizzle of aged balsamic and fresh basil.

This simple yet incredibly flavorful recipe has been refined and perfected over time. While the inspiration for its core technique comes from the meticulous culinary experts at Cook’s Illustrated, I’ve made a key modification that truly sets it apart: embracing the unique qualities of virgin red palm oil. While extra virgin olive oil works beautifully, virgin red palm oil lends a distinct richness and a beautiful golden hue, adding a subtle depth that complements the natural sweetness of the squash. It’s a game-changer for anyone looking to experiment with new flavors and healthful fats.

Why Grilled Zucchini and Summer Squash Are a Summer Must-Have

Grilled zucchini and summer squash aren’t just delicious; they’re also incredibly healthy and convenient. Here’s why they should be a staple in your summer cooking repertoire:

• Effortless Preparation: With minimal chopping and seasoning, these vegetables are ready for the grill in minutes.
• Healthy & Nutritious: Zucchini and summer squash are low in calories, high in water content, and rich in vitamins (especially Vitamin C and K), minerals, and antioxidants. Grilling also helps retain more nutrients compared to other cooking methods that might involve excessive oil.
• Incredible Flavor Profile: Grilling brings out the natural sweetness of the squash, adding a smoky char that creates complex layers of flavor. The texture transforms from firm to tender-crisp, offering a delightful mouthfeel.
• Versatile Pairing: Grilled squash pairs wonderfully with almost any main course, from grilled chicken and steak to fish and plant-based dishes. It’s also fantastic in salads, sandwiches, or even as a light appetizer.
• Seasonal Abundance: Summer brings an abundance of zucchini and various types of summer squash. This recipe is an excellent way to utilize your garden harvest or fresh farmer’s market finds.

Selecting the Best Zucchini and Summer Squash

The success of any simple recipe begins with quality ingredients. When selecting zucchini or summer squash for grilling, look for:

• Firmness: Choose squash that feels firm to the touch, without any soft spots or blemishes.
• Bright Color: The skin should be vibrant in color, whether dark green for zucchini or yellow for summer squash.
• Size Matters: Opt for medium-sized squash, generally 6-8 inches long. Larger squash can sometimes be watery and have larger seeds, which can affect texture.
• Freshness: Avoid squash with wrinkled skin or dry stems, as these are indicators of age.

Preparing Your Squash for Grilling

Proper preparation ensures even cooking and optimal flavor development. The key is consistent slicing:

1. Trim the Ends: Start by washing the squash thoroughly under cool running water and then trimming off both ends.
2. Slice Lengthwise: Using a sharp knife, slice the squash lengthwise into 1/2-inch thick strips. This thickness is crucial – too thin, and they’ll burn quickly; too thick, and they won’t cook through evenly. Slicing lengthwise also gives them a beautiful, elongated shape that’s perfect for grilling and serving.
3. Pat Dry: Gently pat the slices dry with a paper towel. Removing excess moisture helps the oil adhere better and promotes a nicer char on the grill.

Essential Ingredients for Perfectly Grilled Squash

This recipe thrives on simplicity, allowing the natural flavors to shine. Here’s what you’ll need:

• Summer Squash: 1 ½ pounds, trimmed and sliced lengthwise into 1/2-inch strips. A mix of green zucchini and yellow summer squash adds visual appeal.
• Virgin Red Palm Oil or Extra Virgin Olive Oil: 2 tablespoons. Red palm oil offers a unique flavor and vibrant color, while extra virgin olive oil is a classic choice for its fruity notes.
• Kosher Salt: Essential for seasoning. Kosher salt crystals adhere well and provide a balanced salinity.
• Freshly Ground Black Pepper: Adds a pungent, aromatic kick that complements the sweet squash.
• Aged Balsamic Vinegar: A drizzle of quality aged balsamic adds a touch of acidity and sweetness, cutting through the richness of the oil and enhancing the overall flavor.
• Fresh Basil Leaves: A handful, cut in chiffonade. The fresh, aromatic basil provides a bright, herbaceous finish.

Equipment for Grilling Success

While minimal equipment is needed, having the right tools can make the process even smoother:

• Baking Sheet: A standard baking sheet, lined with foil, is perfect for holding your squash slices before and after grilling, making cleanup a breeze.
• Pastry Brush: Ideal for evenly coating both sides of the squash with oil.
• Tongs: Long-handled grilling tongs are essential for safely flipping the squash on the hot grill.
• Grill: A gas grill set to medium heat is recommended for consistent temperature control. A charcoal grill also works, providing an even smokier flavor. (Alternatively, a grill pan or oven can be used – see “Alternative Cooking Methods” below).
• Sharp Knife: For consistent slicing of the squash.
• Cutting Board: A stable surface for preparing your vegetables.
• Small Bowl: For mixing any additional seasonings or for drizzling the balsamic.
• Most of my recommended kitchen tools are listed here, should you need to stock up!

Step-by-Step Grilling Method

Follow these simple steps for perfectly grilled zucchini and summer squash:

1. Prepare the Squash: Lay the trimmed and sliced squash pieces on a foil-lined baking sheet. This makes for easy transfer and cleanup.
2. Oil & Season: Generously brush both sides of each squash slice with virgin red palm oil (or extra virgin olive oil). Then, season liberally with kosher salt and freshly ground black pepper. Don’t be shy with the seasoning; it brings out the best in the squash.
3. Preheat the Grill: Set your gas grill to medium heat and allow it to preheat for at least 10-15 minutes. This ensures even heat distribution and helps prevent sticking.
4. Grill the Squash: Carefully place the seasoned squash slices directly on the preheated grill grates. Cook for about 8-10 minutes total. The key is to get beautiful grill marks and tender, slightly caramelized squash without overcooking it to mush.
5. Flip Halfway: At the 4-minute mark, use your tongs to carefully flip the squash slices. You should see distinct grill marks and a slight softening. Continue grilling for another 4-6 minutes, or until the squash is tender-crisp and nicely charred on both sides.
6. Finish & Serve: Once cooked, remove the squash from the grill and arrange it on a serving platter. Before serving, drizzle generously with aged balsamic vinegar and sprinkle with the freshly cut basil chiffonade. Serve immediately and enjoy the burst of fresh summer flavors!

Alternative Cooking Methods

No outdoor grill? No problem! You can achieve similar delicious results using other methods:

Oven Roasting

If you prefer to cook indoors, oven roasting is an excellent alternative. Follow steps 1 and 2 for preparing and seasoning the squash. Then:

1. Preheat your oven to 400°F (200°C).
2. Arrange the seasoned squash slices in a single layer on a large baking sheet (you may need two to avoid overcrowding). Ensure they don’t overlap, as this will steam rather than roast them.
3. Roast for 15-20 minutes, flipping halfway through, until tender and lightly golden brown at the edges.
4. Proceed with step 6 (drizzling balsamic and basil) before serving.

Grill Pan Method

A cast-iron grill pan can replicate some of the char and flavor of an outdoor grill:

1. Follow steps 1 and 2 for preparing and seasoning the squash.
2. Heat a cast-iron grill pan over medium-high heat until it’s smoking lightly. Add a tiny bit of oil to the pan if needed, though the squash should already be oiled.
3. Place squash slices in a single layer on the hot grill pan. Cook for 3-4 minutes per side, or until distinct grill marks appear and the squash is tender.
4. Proceed with step 6 before serving.

Flavor Variations to Explore

While this recipe is fantastic as is, feel free to experiment with different flavor profiles:

• Garlic Lover’s Delight: Mince 2-3 cloves of garlic and mix them with the oil before brushing onto the squash.
• Lemon Zest Brightness: Add the zest of one lemon to the squash before grilling, and a squeeze of fresh lemon juice after cooking.
• Herbal Infusion: Instead of or in addition to basil, try fresh chopped oregano, thyme, rosemary, or parsley.
• Spicy Kick: Sprinkle a pinch of red pepper flakes with the salt and pepper for a touch of heat.
• Parmesan Finish: For a savory, cheesy twist, sprinkle freshly grated Parmesan cheese over the warm grilled squash immediately after removing it from the grill. The residual heat will melt it slightly.
• Smoked Paprika: A dash of smoked paprika can add a wonderful smoky depth even if you’re cooking indoors.

Serving Suggestions

Grilled zucchini and summer squash are incredibly versatile and can be served in many ways:

• Classic Side Dish: Serve alongside grilled meats like steak, chicken, or fish.
• Salad Topper: Chop the cooled grilled squash and add it to your favorite summer salads for extra texture and flavor.
• Sandwich & Wrap Filler: Use grilled squash in vegetarian sandwiches, wraps, or even paninis.
• Pasta Companion: Toss with pasta, a light sauce, and other vegetables for a quick and healthy meal.
• Appetizer Platter: Arrange on a platter with other grilled vegetables, dips, and artisanal bread for an easy appetizer.

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More Recipe Ideas and Culinary Adventures

Now you know exactly what to do with that mountain of fresh zucchini and summer squash you’ll undoubtedly encounter this season! This versatile side dish is just the beginning of your culinary journey.

Looking for more delicious recipe ideas to inspire your kitchen? Head on over to my comprehensive Recipe Index, where you’ll find a wide array of dishes for every occasion and dietary preference. For exclusive content and convenient cooking on the go, be sure to check out my iPhone and iPad app, packed with unique recipes and helpful features.

And for those who love to dive deep into healthful and flavorful cooking, explore my cookbooks: Nom Nom Paleo: Food for Humans (Andrews McMeel Publishing 2013), a foundational guide to delicious paleo eating; Ready or Not! (Andrews McMeel Publishing 2017), offering flexible and family-friendly meal solutions; and my latest release, Nom Nom Paleo: Let’s Go! (Andrews McMeel Publishing 2021), designed to make healthy cooking fun and accessible. Each book is a treasure trove of recipes, tips, and inspiration to help you nourish yourself and your loved ones.