01 - Preheat oven to 400°F. Line a baking sheet with parchment paper.
02 - In a large skillet over medium heat, cook ground beef until browned, breaking up the meat as it cooks. Drain excess fat if needed.
03 - Add onion, green bell pepper, and garlic to the skillet. Sauté for 3 to 4 minutes, until vegetables are softened.
04 - Incorporate tomato sauce, tomato paste, ketchup, Worcestershire sauce, smoked paprika, brown sugar, salt, black pepper, and oregano. Reduce heat and simmer for 8 to 10 minutes until mixture is thickened. Remove from heat.
05 - Slice baguette in half lengthwise. In a mixing bowl, blend together softened butter, minced garlic, parsley, and salt.
06 - Spread garlic butter evenly over both bread halves. Arrange cut side up on the prepared baking sheet.
07 - Bake in the oven for 5 to 6 minutes until lightly golden.
08 - Generously spoon sloppy joe filling onto one half of each bread piece. Sprinkle mozzarella and Parmesan cheese over the filling.
09 - Return to oven and bake for an additional 5 to 6 minutes, until cheese is fully melted and bubbly.
10 - Place the top bread half over the filled bottom half, press gently, and slice into portions. Serve immediately while hot.