Step 1: Preheat the Oven

Begin by preheating your oven to 400°F (200°C). This ensures that the oven reaches the correct temperature for baking the casserole evenly.

Step 2: Prepare the Squash Mixture

In a large bowl, combine the prepared and cooled squash with eggs, cheese, and Greek yogurt. Ensure that you mix these ingredients well until they are fully combined. This will give the casserole its creamy and rich texture.

Step 3: Season the Mixture

Season the squash mixture with salt, pepper, garlic, and thyme to taste. Mix thoroughly to distribute the seasonings evenly throughout the mixture, enhancing the flavor of the dish.

Step 4: Transfer to Casserole Dish and Top

Pour the seasoned squash mixture into a lightly greased casserole dish. Spread it out evenly. Then, top the mixture with a generous amount of Parmesan cheese, which will add a delicious crust to the casserole.

Step 5: Bake the Casserole

Place the casserole in the preheated oven and bake for about 30 minutes, or until the top is slightly browned. This baking time allows the flavors to meld together and the top to develop a beautiful golden color.

Step 6: Rest and Serve

Once baked, remove the casserole from the oven and allow it to rest for 10 minutes. This resting time helps the casserole set and makes it easier to serve. After resting, slice and serve the casserole, enjoying its creamy and flavorful goodness!