Preheat the oven to 375°F and lightly grease a 9x13 inch baking dish.
Brown the ground beef in a large skillet over medium-high heat, breaking it apart with a wooden spoon for 6 to 8 minutes.
Drain most of the excess fat from the skillet.
Add the diced onion and red bell pepper to the skillet and cook for 4 to 5 minutes until softened.
Stir in the minced garlic and cook for 30 seconds until fragrant.
Add tomato sauce, brown sugar, Worcestershire sauce, yellow mustard, chili powder, smoked paprika, salt, and black pepper to the skillet. Stir until well combined.
Reduce heat to medium-low and simmer the sauce for 8 to 10 minutes until thickened.
Transfer the meat mixture evenly into the prepared baking dish.
Separate the biscuit dough and arrange biscuits over the meat mixture, spacing them slightly apart.
Optionally, brush the biscuit tops with melted butter.
Bake for 15 to 18 minutes until biscuits are golden brown and fully cooked.
Sprinkle shredded cheddar cheese over the biscuits and return to the oven for 3 to 5 minutes until the cheese melts.
Let the casserole rest for 5 minutes, garnish with fresh parsley, and serve hot.