This Easy Cheesy Zucchini Squash Casserole is a warm, comforting dish that’s perfect for any meal. It’s packed with fresh zucchini, creamy cheese, and a crunchy topping that brings it all together!
You won’t believe how quickly this comes together! Just layer the ingredients and pop it in the oven—it’s like a hug in a dish. I love serving it alongside grilled chicken or just on its own! 🥒🧀
Key Ingredients & Substitutions
Zucchini and Yellow Squash: These two vegetables are the stars of the dish! If you can’t find them, feel free to use other vegetables like eggplant or bell peppers, though the flavor will change.
Cheddar and Mozzarella Cheese: I love using a mix for creamy goodness! If you’re looking for a lighter option, try low-fat cheese or dairy-free cheese alternatives to suit your needs.
Sour Cream: This ingredient brings creaminess to the casserole. You can substitute Greek yogurt for a healthier option, or leave it out for a lighter dish, adding a bit more seasoning if needed.
Mayonnaise: If you’re not a fan, you can replace it with plain yogurt or even some additional sour cream. This keeps the mixture creamy without a strong mayo taste.
What’s the Best Way to Sauté the Vegetables?
Getting the veggies just right is crucial for flavor and texture. Start by heating your skillet over medium heat, and follow these tips:
- Use olive oil or butter to add rich flavor as you sauté. Both options work well!
- Add the sliced onion first; it needs a few minutes to soften before garlic goes in. Garlic cooks quickly and can burn, so add it after the onion!
- Keep stirring while cooking the zucchini and yellow squash. This helps them cook evenly and release moisture.
- Don’t rush this process! Let them soften a bit, about 5-7 minutes, but don’t overcook them—they should still have some texture.
Easy Cheesy Zucchini Squash Casserole
Ingredients You’ll Need:
For the Casserole:
- 4 cups zucchini, thinly sliced (about 2 medium zucchinis)
- 4 cups yellow squash, thinly sliced (about 2 medium squash)
- 1 small onion, thinly sliced
- 3 cloves garlic, minced
- 1 ½ cups shredded cheddar cheese
- 1 cup shredded mozzarella cheese
- 1 cup sour cream
- 1/2 cup mayonnaise
- 2 large eggs, beaten
- 1/2 cup grated Parmesan cheese
- 1 tsp salt
- 1/2 tsp black pepper
- 1/2 tsp dried basil (or 1 tbsp fresh chopped basil)
- 1/2 tsp dried oregano
- 1/4 tsp crushed red pepper flakes (optional)
- 2 tbsp olive oil or butter (for sautéing)
- Fresh parsley, finely chopped, for garnish
How Much Time Will You Need?
This Easy Cheesy Zucchini Squash Casserole will take you about 15 minutes to prepare, plus 35-40 minutes of baking time. All together, you’re looking at around an hour to create this delicious dish, perfect for a cozy family dinner!
Step-by-Step Instructions:
1. Prepare the Oven and Dish:
Begin by preheating your oven to 350°F (175°C). While the oven heats up, lightly grease a 9×13 inch casserole dish to prevent sticking.
2. Sauté the Vegetables:
In a large skillet, heat 2 tablespoons of olive oil or butter over medium heat. Add the thinly sliced onion and sauté for about 3-4 minutes, until it’s slightly soft. Then, stir in the minced garlic and cook for another minute until fragrant. Next, add the zucchini and yellow squash slices to the skillet. Cook for about 5-7 minutes, stirring occasionally, until they start to soften. Once done, remove the skillet from heat and let the mixture cool slightly.
3. Mix the Casserole Ingredients:
In a large mixing bowl, combine the sour cream, mayonnaise, beaten eggs, salt, black pepper, dried basil, dried oregano, and crushed red pepper flakes (if you’re using them). Mix everything together until it’s well combined. Then, gently fold in the sautéed vegetables along with the shredded cheddar and mozzarella cheeses. Make sure it’s all mixed thoroughly!
4. Assemble the Casserole:
Transfer the cheesy vegetable mixture into the prepared casserole dish, spreading it out evenly. Finish by sprinkling the grated Parmesan cheese evenly over the top for an extra cheesy layer.
5. Bake and Serve:
Pop the casserole into your preheated oven and bake uncovered for 35-40 minutes, or until the casserole is bubbly and the top turns golden brown. Once out of the oven, let it cool for about 5 minutes before serving. To add a touch of color, garnish with freshly chopped parsley!
Enjoy this creamy, cheesy, and comforting zucchini squash casserole as a delightful side dish or a light main course! It’s sure to be a hit at the dinner table.
FAQ for Easy Cheesy Zucchini Squash Casserole
Can I Use Frozen Zucchini or Squash for This Recipe?
While you can technically use frozen zucchini and yellow squash, I recommend using fresh for the best texture. If you must use frozen, make sure to thaw and drain them well to avoid excess moisture in the casserole.
Can I Make This Casserole Ahead of Time?
Absolutely! You can prepare the casserole up to the baking step and cover it tightly with plastic wrap or foil. Store it in the refrigerator for up to 24 hours. When ready to bake, let it sit at room temperature for about 30 minutes before popping it in the oven.
How Do I Store Leftovers?
Leftovers can be stored in an airtight container in the fridge for up to 3 days. To reheat, simply pop it into the microwave or warm it in the oven at 350°F (175°C) until heated through.
Can I Add Other Vegetables to This Casserole?
Absolutely! Feel free to mix in other veggies like bell peppers, spinach, or even mushrooms for added flavor and nutrition. Just make sure to sauté them along with the onions and garlic to keep the texture consistent.
