Making Cheesy Asparagus Casserole is straightforward. Follow these simple instructions:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Prepare Asparagus: In a large pot of boiling salted water, blanch the asparagus pieces for about 3-4 minutes until they are tender but still crisp. Drain and set aside.
3. Mix Cheese Sauce: In a mixing bowl, combine the sour cream, mayonnaise, garlic powder, onion powder, salt, black pepper, and red pepper flakes. Stir in the sharp cheddar and mozzarella cheese until well blended.
4. Combine Ingredients: In a large mixing bowl, combine the blanched asparagus with the cheese mixture, ensuring that all pieces are well-coated.
5. Prepare for Baking: Pour the mixture into a greased 9×13-inch baking dish, spreading it evenly.
6. Add Topping: In a small bowl, mix the breadcrumbs with olive oil. Sprinkle the breadcrumb mixture evenly over the top of the casserole. Finally, add the grated Parmesan cheese on top for extra flavor.
7. Bake: Place the casserole in the preheated oven and bake for 35-40 minutes, or until the top is golden brown and bubbly.
8. Cool: Remove from the oven and let it cool for 5-10 minutes before serving.

By following these steps, you’ll create an incredible cheesy asparagus casserole that will become a favorite at your table.