How many servings does this recipe make?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

What ingredients do I need for Grilled Portobellos and Summer Vegetables?

You need 13 ingredients. The key ingredients include: 1 whole medium yellow squash, sliced in half lengthwise, 1 whole medium zucchini, sliced in 1/2 lengthwise, 1 medium eggplant, sliced into 1/2-inch thick circles, 1 red onion, sliced in 1/2-inch thick circles, and more.

Is Grilled Portobellos and Summer Vegetables suitable as vegetarian?

Yes, Grilled Portobellos and Summer Vegetables falls under the Vegetarian category and is a great choice for this type of meal.

How do I store leftover Grilled Portobellos and Summer Vegetables?

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

Grilled Portobellos and Summer Vegetables Recipe

Name: Grilled Portobellos and Summer Vegetables
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 1 whole medium yellow squash, sliced in half lengthwise; 1 whole medium zucchini, sliced in 1/2 lengthwise; 1 medium eggplant, sliced into 1/2-inch thick circles; 1 red onion, sliced in 1/2-inch thick circles; 2 Roma tomatoes, sliced in half lengthwise; 3 green onions; 1 red bell pepper, seeds removed and quartered into large flat pieces; 1 gold or yellow bell pepper, seeds removed and quartered into large flat pieces; 2 portobello mushroom caps; Kosher salt; Freshly ground black pepper; 1/2 cup extra-virgin olive oil; 4 cloves garlic, minced

Try this homemade Grilled Portobellos and Summer Vegetables recipe the whole family will love. Made with yellow squash, zucchini, eggplant and red onion…

This Grilled Portobellos and Summer Vegetables relies on simple, everyday ingredients such as green onions, portobello mushroom caps, kosher salt and freshly ground black pepper. It comes together quickly and makes 4 servings, at about 354 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.

Updated Jun 30, 2026

Serves 4 Vegetarian

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Taste as you go and adjust the seasoning before serving.
Avoid overcrowding the pan — cook in batches if needed for the best texture.
Let the dish rest for a few minutes before serving so the flavors settle.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

Feel free to swap in similar ingredients you already have on hand and adjust seasoning to taste.

No specific allergen information. Please check the ingredient list for possible allergens.

My Personal Notes

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Grilled Portobellos and Summer Vegetables

Tips for the best results

Variations & substitutions

My Personal Notes

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