Creating a delicious Vegetable Casserole is simple when you follow these clear steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Prepare Vegetables: In a large bowl, combine broccoli, carrots, bell peppers, mushrooms, and corn.
3. Mix Sauce: In a separate bowl, whisk together heavy cream, garlic powder, onion powder, salt, and pepper.
4. Combine: Pour the cream mixture over the vegetables and stir until everything is evenly coated.
5. Layer in Dish: Grease a 9×13-inch baking dish with olive oil. Pour the vegetable mixture into the dish.
6. Add Cheese: Sprinkle shredded cheddar cheese evenly over the top of the vegetable mixture.
7. Top with Breadcrumbs: Generously cover the cheese layer with breadcrumbs for a crispy topping.
8. Bake: Place the baking dish in the preheated oven and bake for 30-40 minutes, or until the top is golden brown.
9. Cool: Remove from the oven and let it cool for about 10 minutes before serving.
10. Garnish: Optionally, sprinkle fresh parsley on top for a pop of color.

Following these steps will guide you in creating a Vegetable Casserole that is not only delicious but also visually appealing.