This grilled medley brings out the natural sweetness of summer squash and zucchini with minimal effort. The high heat of the grill caramelizes the edges while keeping the centers tender.
I developed this method to highlight the fresh flavors of garden vegetables without overpowering them. A simple toss with olive oil, salt, and pepper is all you need before grilling.
The result is a side dish that’s perfectly charred on the outside and tender-crisp inside. It pairs beautifully with any protein and takes just 10 minutes on the grill.
Serve it warm for the best texture and flavor. Here’s how to make this seasonal favorite.
Ingredients for Recipe for Summer Squash and Zucchini
Fresh garden veggies meet the grill for a simple, flavorful side dish.
| Ingredient | Amount | Notes |
|---|---|---|
| Summer Squash 🥒 | 2 whole | Medium-sized, sliced lengthwise |
| Zucchini 🥒 | 2 whole | Medium-sized, sliced lengthwise |
| Extra-Virgin Olive Oil 🫒 | 3 tbsp | Divided for tossing and finishing |
| Kosher Salt 🧂 | 1 tsp | Diamond Crystal preferred |
| Freshly Ground Black Pepper 🌶️ | ½ tsp | Coarse grind for texture |
| Garlic Cloves 🧄 | 2 cloves | Minced or pressed |
| Fresh Basil Leaves 🌿 | ¼ cup | Loosely packed, torn |
| Lemon 🍋 | 1 whole | Zest and juice for brightness |
| Red Pepper Flakes 🌶️ | ¼ tsp | Optional for heat |
| Parmesan Cheese 🧀 | ¼ cup | Freshly grated, for serving |
The squash and zucchini should be firm and vibrant in color—skip anything soft or dull. Farmers markets or your own garden are ideal, but Whole Foods and Trader Joe’s usually have great options too. Look for medium-sized ones; the monster zucchinis can be watery and seedy. Slice them lengthwise into 1/2-inch planks so they hold up on the grill. The olive oil should be extra-virgin—this is where quality shines.
No fresh basil? Fresh parsley or mint can stand in, though the flavor will shift. Out of lemon? A splash of red wine vinegar adds similar brightness. For a dairy-free version, swap the Parmesan for nutritional yeast or vegan cheese. The garlic can be granulated at half the amount if you’re in a pinch, but fresh is always better here. Red pepper flakes can be skipped or doubled depending on your heat preference.
Leftovers keep in the fridge for 3-4 days in an airtight container. Reheat in a skillet or under the broiler to revive the char. Best served fresh off the grill, though. For meal prep, slice the squash a day ahead and store it dry—it’ll release moisture, which you can blot off before grilling.
Why You’ll Love This Recipe
- One Pan Wonder: I toss sliced summer squash and zucchini with olive oil, salt, and pepper, then roast—no fancy techniques, just simple prep and a hot oven.
- Crispy Edges: The high heat turns the edges golden and caramelized while the centers stay tender. That contrast? Ridiculously good.
- Feeds a Crowd: I double the batch for potlucks or meal prep—it’s light enough for a side but hearty enough to stand alone.
- Budget Stretch: Between us, summer squash and zucchini are cheap in season, and this recipe uses just a drizzle of olive oil to make them shine.
Step-by-Step Instructions for Summer Squash and Zucchini
This garden-fresh method brings out the natural sweetness while adding a smoky depth from the grill.
Step 1: Prepare the Squash and Zucchini
Slice the 2 whole Summer Squash and 2 whole Zucchini lengthwise into ¼-inch thick planks. I like to keep the skin on for texture and color, but make sure to wash them thoroughly first. The even thickness ensures they cook uniformly on the grill.
Arrange the slices on a large baking sheet and pat them completely dry with a clean kitchen towel. Moisture on the surface can prevent proper charring, so take your time with this step. You’re building the foundation for perfect grill marks here.
Step 2: Season and Marinate
Drizzle 2 tbsp of the Extra-Virgin Olive Oil over the sliced squash and zucchini, then sprinkle evenly with the 1 tsp Kosher Salt and 0.5 tsp Freshly Ground Black Pepper. Use your hands to gently toss everything together, ensuring each piece is coated.
Add the 2 cloves Garlic Cloves, minced or pressed, and the 0.25 tsp Red Pepper Flakes for a subtle kick. Let the mixture sit for 10-15 minutes while you preheat the grill. This brief marinade time allows the flavors to meld and penetrate the vegetables.
Step 3: Grill to Perfection
Preheat your grill to medium-high heat (about 400°F). Clean the grates thoroughly with a grill brush to prevent sticking. Place the squash and zucchini slices directly on the grates, arranging them in a single layer.
Grill for 4-5 minutes per side, until the slices develop distinct grill marks and are tender but still hold their shape. Avoid moving them too soon—let them sear properly before flipping. The edges should look slightly charred, adding that coveted smoky flavor.
Step 4: Finish and Serve
Transfer the grilled squash and zucchini to a serving platter. Drizzle with the remaining 1 tbsp Extra-Virgin Olive Oil and the juice of the 1 whole Lemon. The acidity from the lemon brightens the flavors and cuts through the richness of the oil.
Tear the 0.25 cup Fresh Basil Leaves over the top and sprinkle with the 0.25 cup Parmesan Cheese. The basil adds a fresh, herbal note, while the Parmesan introduces a salty, nutty depth. Serve immediately while warm, and enjoy the vibrant, layered flavors of this simple yet elegant dish.
Pro Tips For Making Recipe For Summer Squash And Zucchini
- Slice Evenly: Cut the summer squash and zucchini into uniform 1/4-inch thick half-moons so they cook at the same rate—I learned this the hard way after pulling out half raw, half mushy batches.
- Salt the Squash: Toss the sliced squash with 1 teaspoon of kosher salt and let it sit in a colander for 10 minutes to draw out excess water, then pat dry. Sounds weird, but it works: no more soggy veggies.
- Crank the Heat: Use high heat and a heavy pan to get a good sear without stewing the squash. About 2 tablespoons of olive oil—enough to coat the bottom—should shimmer before adding the veggies.
- Skip the Crowding: Cook in batches if needed to avoid steaming the squash instead of browning it. Resist the urge to stir constantly; let them sit for 2-3 minutes per side for that golden color.
Regional Styles of These Flavors
Mediterranean Style
In Greece, they toss grilled zucchini with crumbled feta, Kalamata olives, and a drizzle of extra-virgin olive oil. I love adding 1 tsp dried oregano for that classic Mediterranean herbaceous note. The salty feta complements the sweet squash perfectly.
Mexican Street Style
For a south-of-the-border twist, sprinkle with cotija cheese and chili powder after grilling. I add 1 tbsp lime juice instead of lemon and top with fresh cilantro. Serve with warm corn tortillas for a quick vegetarian taco.
Italian Rustic Style
Italian cooks often layer grilled squash with fresh mozzarella and tomato slices, then drizzle with balsamic glaze. I use 1 tbsp aged balsamic vinegar reduced with 1 tsp honey for a quick homemade version. 🔥
Southern US Style
In the American South, they might serve this with a sprinkle of cornmeal in the seasoning mix for extra crunch. I add 1 tsp smoked paprika to the olive oil before grilling for a subtle BBQ flavor that pairs well with pulled pork.
French Provençal Style
Herbes de Provence is the star here—sprinkle 1 tsp of the blend before grilling. I finish with 1 tbsp chopped fresh thyme and a shower of Niçoise olives. The floral herbs transport you straight to the south of France. ✨
Asian Fusion Style
For an Asian-inspired version, I brush the slices with 1 tbsp soy sauce mixed into the olive oil and finish with toasted sesame seeds and sriracha drizzle. A sprinkle of scallions adds the perfect fresh finish.
Nutrition Facts
Frequently Asked Questions
Should I peel the squash and zucchini first?
No, the skin is edible and adds texture. Just wash them thoroughly before slicing.
Can I use an indoor grill pan instead?
Yes, heat it to medium-high and cook for 4-5 minutes per side. You may need to work in batches to avoid crowding.
How do I prevent the slices from sticking to the grill?
Clean and oil the grates well before cooking. Pat the slices completely dry first.
What if my zucchini is very large?
Slice it in half lengthwise and scoop out seeds if watery. Thicker slices may need 1-2 extra minutes per side.
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