Making Broccoli Cheese Casserole is simple. Just follow these easy steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Prepare the Pan: Grease a 9×13 inch baking dish with olive oil.
3. Blanch Broccoli: In a pot of boiling water, blanch broccoli florets for about 3 minutes. Drain and set aside.
4. Mix Casserole Base: In a large bowl, mix cream of mushroom soup, mayonnaise, garlic powder, and onion powder until well combined.
5. Add Cheese and Broccoli: Stir in the shredded cheddar cheese and blanched broccoli. Season with salt and pepper to taste.
6. Transfer Mixture: Spoon the mixture into the prepared baking dish, spreading it evenly.
7. Prepare Topping: In a small bowl, combine breadcrumbs and grated Parmesan cheese. Sprinkle this mixture evenly over the casserole.
8. Bake: Place the casserole in the preheated oven and bake for 25-30 minutes, or until the top is golden brown and bubbly.
9. Cool and Serve: Allow the casserole to cool for a few minutes before serving.

Using these straightforward steps, you can create a delicious Broccoli Cheese Casserole that can impress anyone at your dinner table.