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Yellow Squash and Zucchini Casserole

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  • Author: Kim Cooks Easy
  • Prep Time: 15 minutes
  • Cook Time: 30 minutes
  • Total Time: 45 minutes
  • Yield: 6 servings
  • Category: Side Dish
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian

Description

This yellow squash and zucchini casserole is a cozy, comforting side dish packed with fresh summer squash, sautéed onions, creamy cheese, and a crispy breadcrumb topping. It’s the perfect way to use up garden veggies and goes great with any meal


Ingredients

  • 2 medium yellow squash, sliced

  • 2 medium zucchini, sliced

  • 1 small yellow onion, diced

  • 2 cloves garlic, minced

  • 1 tablespoon olive oil

  • 1/2 teaspoon salt

  • 1/4 teaspoon black pepper

  • 1/2 teaspoon dried thyme

  • 1/2 teaspoon dried basil

  • 1/2 cup sour cream

  • 1/2 cup shredded cheddar cheese

  • 1/4 cup grated Parmesan cheese

  • 1/2 cup breadcrumbs

  • 2 tablespoons melted butter


Instructions

  • Preheat oven to 375°F (190°C).

  • In a large skillet over medium heat, add olive oil. Sauté onion for 3–4 minutes until soft. Add garlic and cook for 30 seconds more.

  • Add zucchini and yellow squash to the skillet. Season with salt, pepper, thyme, and basil. Cook for 6–8 minutes until squash is slightly tender. Remove from heat.

  • In a large bowl, mix cooked vegetables with sour cream, cheddar cheese, and Parmesan.

  • Pour the mixture into a greased 9×9-inch baking dish.

  • In a small bowl, combine breadcrumbs and melted butter. Sprinkle evenly over the casserole.

  • Bake for 25–30 minutes, or until the top is golden brown and the casserole is bubbly.

 

  • Let cool for a few minutes before serving.


Notes

  • You can swap sour cream for Greek yogurt for a lighter version.

  • Add a pinch of red pepper flakes if you like a little heat.

  • This dish can be made ahead and baked just before serving.


Nutrition

  • Serving Size: 1/6 of casserole
  • Calories: 210
  • Sugar: 4g
  • Sodium: 370mg
  • Fat: 14g
  • Saturated Fat: 6g
  • Unsaturated Fat: 7g
  • Trans Fat: 0g
  • Carbohydrates: 14g
  • Fiber: 2g
  • Protein: 6g
  • Cholesterol: 25mg