Step-by-Step Instructions
Preheat the Oven:
Preheat your oven to 350°F (175°C). Grease a 9x13-inch baking dish and set aside.
Cook the Squash and Onion:
In a large skillet, melt the butter over medium heat.
Add the sliced squash and diced onion. Cook for 5–7 minutes, stirring occasionally, until softened.
Mix the Filling:
In a mixing bowl, combine the cooked squash and onion with shredded cheddar cheese, sour cream, beaten eggs, garlic powder, salt, and pepper. Stir until well combined.
Assemble the Casserole:
Pour the mixture into the prepared baking dish, spreading it evenly.
Prepare the Topping:
In a small bowl, combine the crushed crackers with melted butter. Sprinkle the mixture evenly over the casserole.
Bake:
Bake in the preheated oven for 25–30 minutes, or until the topping is golden brown and the casserole is bubbly.
Serve:
Remove from the oven, let it cool slightly, and serve warm.