Follow these simple steps to create your Sloppy Joe Casserole:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Cook Beef: In a large skillet over medium heat, brown the ground beef until fully cooked. Drain excess fat.
3. Add Vegetables: Stir in the diced onion and bell pepper. Cook until softened, approximately 5 minutes.
4. Mix Ingredients: Add the tomato sauce, ketchup, brown sugar, Worcestershire sauce, garlic powder, onion powder, mustard, salt, and pepper. Stir to combine.
5. Simmer: Let the mixture simmer on low heat for about 10 minutes to allow flavors to meld.
6. Layer Casserole: Pour the meat mixture into a greased 9×13 inch baking dish. Top evenly with shredded cheddar cheese.
7. Prepare Dough: Open the can of biscuits or crescent rolls. Cut each biscuit in half if using biscuits, and arrange them over the cheese in a single layer.
8. Bake: Place the casserole in the preheated oven. Bake for 30-35 minutes or until the topping is golden brown.
9. Garnish: Remove from oven and let it cool slightly. Garnish with fresh parsley if desired.

These straightforward steps ensure that your Sloppy Joe Casserole turns out incredible every time!