01 -
Heat a large skillet over medium-high heat. Add the ground beef, diced onions, and diced bell peppers. Cook until the beef is fully browned with no pink remaining, then drain any excess grease.
02 -
Stir in beef bouillon powder, onion powder, garlic powder, salt, and black pepper to taste. Add tomato sauce, ketchup, yellow mustard, brown sugar, and Worcestershire sauce. Mix well and bring to a gentle simmer.
03 -
Reduce the heat to low and simmer the mixture for 5–10 minutes, stirring occasionally.
04 -
Spoon the sloppy Joe mixture onto the hamburger buns, top with a slice of cheese, and serve warm.