This Easy Cheesy Zucchini Squash Casserole is a warm, comforting dish packed with fresh zucchini, melty cheese, and a buttery crumb topping. It’s perfect for a weeknight dinner!
Honestly, who can resist cheese? This casserole is not only tasty but also a great way to sneak in some veggies. I usually serve it with crusty bread for the ultimate comfort meal!
Key Ingredients & Substitutions
Zucchini and Yellow Squash: These are your star ingredients. They soften nicely and take on flavors well. If you can’t find these, consider using eggplant or mushrooms as alternatives.
Cheese: Cheddar and mozzarella create a great texture and flavor. For a twist, try pepper jack for some heat or use a dairy-free cheese if you need a vegan option. Just ensure it’s meltable!
Sour Cream and Mayonnaise: They give creaminess. For a lighter option, Greek yogurt works well here. You can also use a plant-based yogurt for a dairy-free version.
Bread Crumbs: Italian-style breadcrumbs add a nice crunch on top. If you prefer, you can use panko for extra crispiness or crushed crackers for a different flavor.
Herbs: Dried basil and oregano are fantastic, but feel free to experiment with fresh herbs like thyme or rosemary if you have them handy.
How Do I Get My Vegetables Just Right?
Cooking the zucchini and yellow squash properly makes a big difference in texture. Here’s how to do it:
- Heat the olive oil over medium heat before adding the onions and garlic. This builds flavor right from the start.
- When adding the zucchini and squash, stir occasionally but don’t overcook them; you want them tender but not mushy.
- Season them while cooking to infuse flavor early on. It’s a small step, but it really enhances the dish!
Following these tips ensures your casserole has the right balance of flavors and textures. It helps that the veggies will continue to cook a bit in the oven, too!
Easy Cheesy Zucchini Squash Casserole
Ingredients You’ll Need:
For The Casserole:
- 3 medium zucchinis, sliced
- 3 medium yellow squashes, sliced
- 1 medium onion, finely chopped
- 2 cloves garlic, minced
- 2 cups shredded cheddar cheese
- 1 cup shredded mozzarella cheese
- 1/2 cup grated Parmesan cheese
- 1/2 cup sour cream
- 1/2 cup mayonnaise
- 2 large eggs, beaten
For The Topping:
- 1 cup Italian-style breadcrumbs
- 2 tbsp butter, melted
Seasonings:
- 2 tbsp olive oil
- 1 tsp dried basil
- 1 tsp dried oregano
- Salt and pepper, to taste
Garnish:
- Fresh parsley, chopped (for garnish, optional)
How Much Time Will You Need?
This recipe takes about 15 minutes to prepare and approximately 35-40 minutes to bake. It’s a great option for a weeknight meal as you can have it ready to serve in under an hour!
Step-by-Step Instructions:
1. Preheat the Oven:
Start by preheating your oven to 350°F (175°C). This will ensure your casserole cooks evenly when it goes in.
2. Sauté the Vegetables:
In a large skillet, heat the olive oil over medium heat. Add the chopped onion and minced garlic. Sauté these until they are softened and fragrant, which should take about 3-4 minutes.
3. Cook the Zucchini and Squash:
Next, add the sliced zucchini and yellow squash to the skillet. Cook this mixture, stirring occasionally, until the vegetables are just tender—this will take roughly 5-7 minutes. Season with salt, pepper, basil, and oregano, then remove from heat and allow to cool slightly.
4. Make the Creamy Mixture:
In a large mixing bowl, combine the sour cream, mayonnaise, and beaten eggs. Mix these together until smooth.
5. Combine Everything:
Now, stir in the sautéed vegetables along with the shredded cheddar and mozzarella cheese. Mix this well to ensure everything is evenly combined.
6. Assemble the Casserole:
Pour the mixture into your prepared baking dish, spreading it evenly across the bottom.
7. Add the Topping:
In a small bowl, mix the breadcrumbs with melted butter and the grated Parmesan cheese. Sprinkle this mixture evenly over the top of the casserole.
8. Bake the Casserole:
Place the dish in the preheated oven and bake uncovered for 35-40 minutes. You’re looking for a golden brown, bubbly top.
9. Cool and Serve:
Once baked, remove the casserole from the oven and let it sit for about 10 minutes. This allows it to set a little, making it easier to serve.
10. Garnish and Enjoy:
If you like, garnish with freshly chopped parsley before serving. Serve it warm and enjoy your delightful casserole!
FAQ for Easy Cheesy Zucchini Squash Casserole
Can I Use Other Vegetables in This Casserole?
Absolutely! You can substitute or add other vegetables like bell peppers, carrots, or even spinach. Just make sure to sauté them until tender before mixing them in with the other ingredients.
How Should I Store Leftovers?
Leftovers can be stored in an airtight container in the fridge for up to 3 days. To reheat, place portions in the microwave or warm gently in the oven until heated through.
Can I Make This Casserole Ahead of Time?
Yes! You can prepare the casserole a day in advance, cover it tightly, and refrigerate. When ready to bake, allow it to come to room temperature before baking or increase the baking time if going straight from the fridge.
What Can I Serve With This Casserole?
This casserole pairs wonderfully with a simple green salad or crusty bread. It can also serve as a side dish with grilled meats or fish for a complete meal!
