Summery Tomato and Squash Casserole

This is an easy and delicious light casserole packed with the season’s best produce.

5 from 1 vote
Print Recipe

Summery Tomato and Squash Casserole

Prep Time15 mins
Cook Time45 mins
Course: Main Course
Servings: 9
Calories: 181kcal
Author: Kim Maes


  • 1 ½ cups (170 g) cheddar cheese, shredded
  • cup (33 g) fresh Parmesan cheese, grated
  • 2 cloves garlic , minced
  • ½ teaspoon (.5 g) dried oregano
  • cup (10 g) fresh basil, slivered, divided
  • 1 teaspoon (6 g) salt
  • ½ teaspoon (2 g) pepper
  • 2 medium zucchini , thinly sliced, slices drained on paper towels to absorb excess liquid
  • 5 plum tomatoes , thinly sliced, slices drained on paper towels to absorb excess liquid
  • ¼ cup (56.5 g) butter
  • ¼ cup (28 g) sweet onion, finely diced
  • ¾ cup (90 g) fine gluten-free breadcrumbs
  • 1 tablespoon (3 g) fresh chives, finely chopped


  • Preheat the oven to 375°F. Lightly grease a 9x9-inch pan. Combine cheddar, Parmesan, garlic, oregano, and 2 tablespoons basil in a large bowl. Season mixture with salt and pepper and set aside.
  • To assemble casserole: Arrange ½ of the zucchini slices in the pan. Sprinkle ¼ of the cheese mixture on top. Next, arrange ½ of the tomato slices. Sprinkle with another ¼ of the cheese mixture. Then layer the remaining zucchini slices on top. Sprinkle another ¼ of the cheese mixture. Finally, add the remaining tomato slices and top with the last of the cheese mixture.
  • To make topping: Melt butter in a skillet over medium heat. Add onions and cook until translucent. Add gluten-free breadcrumbs and cook until they have absorbed the butter and just start to become very lightly toasted. Sprinkle bread crumb mixture on top of casserole.
  • Cover loosely with foil that has been lightly oiled and bake in preheated oven for 25 minutes. Remove foil and bake until the top is nicely browned and vegetables are tender, about 15-20 minutes longer. Let sit for at least 15 minutes before serving. Garnish with remaining fresh basil and fresh chives.


Nutrition Facts
Summery Tomato and Squash Casserole
Amount Per Serving
Calories 181 Calories from Fat 117
% Daily Value*
Fat 13g20%
Saturated Fat 8g40%
Trans Fat 0.2g
Polyunsaturated Fat 1g
Monounsaturated Fat 3g
Cholesterol 35mg12%
Sodium 487mg20%
Potassium 229mg7%
Carbohydrates 10g3%
Fiber 1g4%
Sugar 2g2%
Protein 7g14%
Vitamin A 813IU16%
Vitamin C 13mg16%
Calcium 195mg20%
Iron 0.4mg2%
* Percent Daily Values are based on a 2000 calorie diet.
Disclaimer: All nutrition facts on Gluten Free & More are meant only as a guide and may differ depending on product brands used or ingredient substitutions. Some errors may occur, so you are encouraged to confirm the recipe’s ingredient and nutrition suitability for your own diet.
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Tags: Casserole Kim Maes Squash Tomatoes
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Sept-Oct Cover 2023



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