Position oven rack to the middle and pre-heat to 400F. Line a sheet pan with parchment paper.
Spray sweet potato halves with cooking spray on all sides. Coat with salt and pepper.
Place sweet potatoes flat side down onto prepared sheet pan. Bake for 40-50 minutes, or until they can be easily pierced with a fork and totally cooked through.
While the sweet potatoes are cooking, prepare the sloppy joe mix. Pre-heat a large saute pan or pot to medium.
Add beef and crumble with a spatula.
When the beef is half pink, add onion, bell pepper, paprika, salt, and black pepper. Cook for 6-8 minutes, stirring occasionally, until onions and peppers are tender and cooked through.
Add garlic and stir. Cook until just fragrant, about 1-2 minutes.
Add Ketchup, mustard, and Worcestershire sauce. Stir.
Reduce heat to medium-low and cover with a lid. Simmer for 10-15 minutes.
Turn off the heat. Stir in parmesan until melted and combined.
Assemble bowls: Place sweet potato half flat side up. Scoop sloppy joe mixture over top. Add toppings and enjoy!