01 - Heat a large skillet over medium-high heat. Add ground beef and cook, breaking it up with a spoon, until browned. Drain excess fat if necessary.
02 - Add onion, green bell pepper, and garlic to the skillet. Sauté for 4–5 minutes until softened and fragrant.
03 - Stir in tomato sauce, tomato paste, ketchup, Worcestershire sauce, brown sugar, mustard, smoked paprika, salt, pepper, and water. Mix well to combine.
04 - Reduce heat to low and simmer uncovered for 10–15 minutes, stirring occasionally, until thickened. Taste and adjust seasoning as needed.
05 - Heat a separate skillet or griddle over medium heat. Spread butter on the cut sides of the buns and toast until golden brown.
06 - Spoon the hot sloppy joe mixture over the bottom halves of the toasted buns. Top with pickles and cheese if desired, cover with tops, and serve immediately.