Step 1: Prepare the Squash
Preheat your oven to 350°F (175°C).
In a large skillet over medium heat, melt 2 tablespoons of butter.
Add the sliced squash and chopped onion. Sauté for about 5–7 minutes until tender. Remove from heat and drain any excess liquid.
Step 2: Make the Casserole Mixture
In a mixing bowl, combine the cooked squash and onions with salt, pepper, garlic powder, and paprika.
Stir in the shredded cheddar cheese, sour cream, mayonnaise, and beaten egg. Mix well until all ingredients are combined.
Step 3: Assemble the Casserole
Transfer the squash mixture into a greased 9x13-inch baking dish.
In a small bowl, mix the crushed buttery crackers with melted butter. Sprinkle evenly over the top of the casserole.
Step 4: Bake
Place the casserole in the preheated oven and bake for 25–30 minutes or until golden brown and bubbly.
Step 5: Serve & Enjoy
Let the casserole cool for a few minutes before serving.
Garnish with fresh herbs like parsley or chives for extra flavor.