01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper.
02 - In a large skillet over medium heat, cook ground beef, breaking up with a wooden spoon until browned. Drain excess fat if needed.
03 - Add onion, bell pepper, and minced garlic to the skillet. Cook for 3 to 4 minutes until vegetables become soft.
04 - Stir in tomato sauce, tomato paste, ketchup, Worcestershire sauce, smoked paprika, brown sugar, salt, black pepper, and oregano. Simmer for 8 to 10 minutes, stirring occasionally, until thickened. Remove from heat.
05 - Slice baguette in half lengthwise. In a mixing bowl, combine softened butter, finely minced garlic, parsley, and salt.
06 - Spread garlic butter evenly over cut sides of both bread halves. Place them cut side up on the baking sheet. Bake for 5 to 6 minutes until lightly golden.
07 - Remove bread from oven. Spoon sloppy joe filling generously onto each bottom half. Sprinkle mozzarella and Parmesan cheeses evenly over the filling.
08 - Return to oven for 5 to 6 minutes, until cheese is melted and bubbly.
09 - Top with remaining bread halves, gently press together, and slice into individual servings. Serve immediately while hot.