Preheat your oven to 375°F.
In a skillet over medium heat, brown the ground beef. Drain any excess fat.
Stir in ketchup, brown sugar, mustard, 1/2 tsp garlic powder, onion powder, salt, and pepper. Simmer for 5 minutes.
Mix the softened butter with 2 tsp garlic powder. Spread it evenly on the cut sides of the French bread.
Place the bread on a baking sheet. Toast in the oven for 5 minutes until edges are golden.
Remove from oven, spoon the sloppy joe mixture evenly over the bread.
Top with shredded mozzarella and bake again for 5–7 minutes or until cheese is melted and bubbly.
Slice, sprinkle with parsley if you're feelin' fancy, and serve warm!