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Squash, Zucchini and Tomato Casserole

This easy and delicious Squash, Zucchini and Tomato Casserole is the perfect summer side dish to any meal. Filled with sliced vegetables topped with lots of seasonings and shredded Parmesan cheese and baked to perfection!

Fresh summer vegetables from your garden or your local Farmer's Market make this dish extra special. It's so easy to make and tastes amazing!

Squash Zucchini Tomato Bake in glass pan

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If you have an abundance of Zucchini from your garden this is a great way to use them combined with other vegetables for a delicious mix of flavors. Another great recipe to try is this Oven Roasted Zucchini And Squash.

This casserole is easy to make with only ten minutes of prep time and it's ready for the oven. Slice your vegetables, add seasonings and top with olive oil and Parmesan cheese.

You get the perfect combination of flavors in this simple summer vegetable dish and every one will love it. Nothing says summer more than zucchini, squash and tomatoes.

It's such an impressive side dish to serve guests with the beautiful combination of yellow, green and red colors. 

Squash Zucchini Tomato Bake In Square Glass Dish

This fresh summer casserole is the perfect side dish for your summer BBQs and potlucks. It's also easy to make and take to any social event and it's always a hit.

What to Serve with Squash, Zucchini and Tomato Casserole

This vegetable casserole makes a delicious side dish to almost any meal and we especially love to serve it when we are grilling.

Here are two of our favorite grilled recipes that go great with this casserole:

I love tomatoes and they pair so well with the zucchini and squash. If I have leftovers I love reheating them and eating it on top of rice. Such a quick lunch and so good!

Squash Zucchini Tomato Casserole in Glass Dish on counter

Ingredients

See printable recipe card below for all ingredients, specific measurements, and complete instructions.

  • Zucchini, Yellow Squash and Tomatoes - Wash and slice your vegetables evenly.
  • Seasonings - You will need salt, black pepper, garlic powder, dried oregano and dried basil to add more flavor to the dish.
  • Olive Oil - I recommend using Extra Virgin Olive Oil.
  • Shredded Parmesan Cheese - Use freshly grated Parmesan Cheese.

How To Make Squash, Zucchini and Tomato Casserole

  1. Preheat oven to 350 degrees. Spray a square baking dish with non-stick cooking spray.
  2. Lay sliced vegetables on a flat surface.
Sliced vegetables on baking pan
  1. Mix dry seasonings together and sprinkle over vegetables.
Seasoned Sliced Squash Zucchini Tomatoes on baking pan
  1. Stack vegetables, alternating zucchini, yellow squash, and tomato, and stand in the baking dish creating three to four rows.
Stacked Sliced Squash Zucchini Tomatoes in glass baking dish
  1. Drizzle olive oil over the vegetables and top with Parmesan cheese.
Squash Zucchini Tomato In Glass Dish Topped With Cheese
  1. Bake for 30 to 45 minutes depending on desired tenderness.

How To Store Leftovers

Store any leftovers in an airtight container in the refrigerator for up to 2 days. I don't recommend freezing this dish.

Substitutions and Variations

  • Cheese: You can use mozzarella cheese instead of Parmesan cheese.
  • Bread Crumbs: Add a panko breadcrumb topping or for a little crunch you could add a buttery Ritz cracker topping.
  • Vegetables: Don't like squash? No problem you can leave that out and only include the zucchini and tomatoes.
Baked Squash Zucchini Tomato Casserole in Glass Dish on counter

Casserole Recipe FAQs

Are you supposed to peel squash and zucchini?

There is no need to peel the squash, zucchini or tomatoes for this recipe.

Can I use frozen vegetables?

I don't recommend using frozen vegetables in this casserole. Fresh vegetables work best.

Helpful Items For Your Kitchen

If you are looking to update some of your basic kitchen items here are a few items that I recommend and use in my kitchen that are helpful when cooking or baking. (Affiliate links).

Easy Side Dishes To Make

I hope you enjoy this Squash, Zucchini and Tomato Casserole! If you try this recipe, please come back and rate it and leave me a comment below. I love to hear from you!

Squash Zucchini Tomato Bake in glass pan

Squash, Zucchini and Tomato Bake Recipe

Author: Judy Wilson
This easy and delicious Squash, Zucchini, Tomato Bake is the perfect summer side dish to any meal.
Prep Time 10 minutes
Cook Time 30 minutes
Total Time 40 minutes
Course Side Dish
Cuisine American
Servings 9
Calories 70 kcal

Ingredients
  

  • 2 medium zucchini, sliced evenly
  • 2 medium yellow squash, sliced evenly
  • 3 plum tomatoes, sliced evenly
  • ¼ teaspoon dried oregano
  • ¼ teaspoon dried basil
  • ¼ teaspoon garlic powder
  • ¼ teaspoon black pepper
  • ½ teaspoon salt
  • 2 Tablespoon olive oil
  • ½ cup shredded Parmesan cheese

Instructions
 

  • Preheat oven to 350 degrees. Spray a square baking dish with non-stick cooking spray.
  • Lay sliced vegetables on a flat surface. Mix dry seasonings together and sprinkle over vegetables.
  • Stack vegetables, alternating zucchini, yellow squash, and tomato, and stand in the baking dish creating three to four rows.
  • Pour olive oil over the vegetables and top with Parmesan cheese.
  • Bake for 30 to 45 minutes depending on desired tenderness.

Notes

Store any leftovers in an airtight container in the refrigerator for up to 2 days. I don't recommend freezing this dish.

Nutrition

Calories: 70kcalCarbohydrates: 4gProtein: 3gFat: 5gSaturated Fat: 1gPolyunsaturated Fat: 0.5gMonounsaturated Fat: 3gCholesterol: 5mgSodium: 232mgPotassium: 290mgFiber: 1gSugar: 3gVitamin A: 396IUVitamin C: 18mgCalcium: 67mgIron: 0.5mg
The nutritional information provided is approximate and should only be used as a general guideline. It is an estimate that will vary based on cooking methods and brands of ingredients used.
Did You Make This Recipe? Please Rate, Comment & Share. Thank you!
Squash Zucchini Tomato Casserole Pinterest Pin
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Recipe Rating




Rebecca Sykes

Sunday 20th of August 2023

I've made this three times now and we just love it. Awesome recipe and none of my garden veggies are going to waste. Have made like this before but this recipe is so much better

Judy Wilson

Wednesday 6th of September 2023

Hi Rebecca! Thanks for commenting and I'm glad you liked it. A friend always shares her garden abundance with us and this is one of the first recipes we make and I usually make an extra one for her.

Al

Friday 28th of July 2023

I added finely sliced onion and jalapeño. (Seed and vain removed)

Judy Wilson

Friday 28th of July 2023

That sounds like the perfect additions! My husband loves jalapeños so he would definitely approve! Thanks for sharing.

Melissa Tyrrell

Tuesday 29th of November 2022

I made this with Italian seasoning,salt,freshly ground pepper,minced garlic and I grated mozzarella cheese instead of parmesan. It turned out fantastic! Next time, I'm going to crumble up some Ritz crackers for topping. Thanks for the recipe!

Lisa

Saturday 8th of October 2022

This is the third time I am making this! A crowd pleaser!

Laura Schutze

Tuesday 13th of July 2021

It would be good to add some bread crumbs and brown it off a little in the last 10 minutes. The parmesan alone was a little whimpy. I would make it a bit "au-gratin". I will try that next time with some of the spices in the topping.

Judy

Monday 2nd of August 2021

Hi Laura, Thank you for sharing. I think bread crumbs would be a great addition to this recipe.

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