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Roasted Summer Squash with Sweet Peppers and Onion

Roasted Summer Squash with Sweet Peppers and Onion recipe brings simple elegance to the table. The ingredients in this dish can easily adapted to your taste, and roasting brings out the natural sweetness. It turns fresh vegetables into a bonafide feast.
Roasted Summer Squash With Sweet Peppers And Onion

Easy Roasted Summer Squash with Sweet Peppers and Onion Recipe

I recently had dinner at a high brow local eatery here in town, and they served roasted squash as one of their premium side dishes. I ordered it, expecting something really magnificent, and when my dinner arrived, I was a little taken aback by the Chef’s approach to this dish. It wasn’t bad, it was pure simplicity. Cubes of squash and zucchini, lightly roasted until golden and barely touched with a sprinkle of salt and pepper. I roast vegetables like this all of the time at home, and it never occurred to me that this basic approach was something people pay top dollar to enjoy. I really love this simple elegant side dish featuring a brilliant display of color in the squash, bell peppers and red onion.
squash, zucchini, peppers and onion in mixing bowl

How to Make the Best Roasted Summer Squash with Sweet Peppers and Onions

Serve this simple vegetarian dish as the complementary side to any of your favorite grilling entrees or main dish casseroles.
  • Ingredients you’ll need to make Roasted Summer Squash with Peppers and Onions: One large yellow squash and one large zucchini, one red onion, red bell pepper and orange bell pepper, olive oil, garlic salt, thyme and black pepper.
  • Kitchen gadgets you’ll need: One large sheet pan or two medium size pans, a sharp knife and chopping board, measuring cups and spoons, a mixing bowl and a large spoon for stirring everything together. You can also opt to skip the bowl and mix everything together on the pan.
  • You can easily adjust the amount of vegetables for this simple recipe adding more or using less depending on the amount of servings that you need.
  • You can add quartered potatoes to this recipe. When doing so, keep in mind the size as potatoes will take longer to bake. Place them onto the pan first and allow them to bake then add the remaining ingredients.
  • Store leftovers chilled in the refrigerator for up to 3 days.
  • I love turning these vegetables into a pizza toppr for a round two meal. To do so, arrange them on top of a pizza crust,  drizzle with pizza sauce and plenty of shredded mozzarella cheese for a roasted vegetable pizza.

cubed vegetables on a sheet pan

More Southern Style Roasted Vegetables to Make

This simple recipe is one that I seem to return to over and over again.  It rotates regularly on our menu and it  celebrates the “fresh from the garden” flavors we love. More easy roasted vegetable recipes you may also like to make:

Roasted Squash and Zucchini with peppers and onion


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Roasted Summer Squash with Sweet Peppers and Onion
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5 from 2 votes

Roasted Summer Squash with Sweet Peppers and Onion

Prep Time15 minutes
Cook Time30 minutes
Total Time45 minutes
Course: Side Dish
Cuisine: American
Keyword: roasted-squash-with-sweet-peppers-and-onion, summer-squash
Servings: 4
Calories: 104kcal
Author: Melissa Sperka


  • 1 large yellow squash [to equal 2 cups cubed]
  • 1 large zucchini [to equal 2 cups cubed]
  • 1 medium red onion
  • 1/2 cup sliced sweet red bell pepper
  • 1/2 cup sliced sweet orange bell pepper
  • 2 Tbsp olive oil
  • 1 Tbsp fresh thyme
  • 3/4-1 tsp garlic salt
  • black pepper to taste


  • Preheat the oven to 450°F. Spray a baking sheet liberally with cooking spray.
  • Cut the yellow squash and zucchini into 1/2 inch thick pieces. Thinly slice the onion and cut the peppers into strips.
  • Place all of the vegetables into a medium size mixing bowl. Drizzle with olive oil. Season with thyme, salt and pepper. Mix well, pour into a single layer on pan.
  • Bake for 20 minutes, then stir. Bake an additional 15 minutes. Stir and increase the oven temperature to 475°F. Bake for an additional 5 minutes, or until lightly charred and golden.
  • Serve immediately.


This recipe can be easily doubled, using 2 baking sheets and rotating the pans to allow for even cooking.


Serving: 1serving | Calories: 104kcal | Carbohydrates: 9g | Protein: 2g | Fat: 7g | Saturated Fat: 1g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 5g | Sodium: 444mg | Potassium: 398mg | Fiber: 3g | Sugar: 5g | Vitamin A: 1538IU | Vitamin C: 73mg | Calcium: 39mg | Iron: 1mg
Tried this recipe?Mention @melissassk or tag #melissassk!



  1. 5 stars
    My bf introduced me to this years ago. We add mushrooms or slightly cooked potato pieces often. Add garlic powder for more flavor. Also, easy to put in tin foil on the grill for a bbq.

  2. 5 stars
    I tell ya what;… this recipe is so delicious and easy, that I’ve made it twice already, and of coarse I’m cooking it tonight with Tuna steaks, for Memorial Day weekend.
    Thank you Melissa! I love this recipe!♡♡

  3. Thank you! I made a few more modifications (eg, I don’t eat onions, lower heat etc). But your recipe and explaination gave me the base to start on. Had a delicious lunch and house smelled yummy. Very grateful!! Thanks. I’ll be making it again and again

  4. Wonderful to hear from a JAP friend! I’ve never had a problem with the thyme burning…if you like you could add it midway through cooking or simply lay a couple of whole sprigs on top. 🙂

  5. Great recipe, Melissa. I have made a similar dish using fresh Italian parsley, but it would burn so I began using the dried version. Does your fresh thyme not burn? BTW, I continue to enjoy your recipes on justapinch.com.

  6. Wonderful dish, Melissa. I’ve made a similar one that calls for fresh parsley, but I started using dried because the fresh would burn. Does your fresh thyme not burn? (BTW, I continue to enjoy your recipes on justapinch.com).

  7. Love, love, love the veggies…

    One of the major reasons I rarely if ever go out to eat my “sissy”…
    I can and usually do, do better in flavor and style!! Why pay triple fold when I can and do better at home?

    Only thing missing is the “someone cleaning up”!! Must, must figure out a way around this I say!! 😉

    Beautiful recipe!!!

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