Add ground beef and cook until browned, breaking it up as it cooks.
Add chopped onions and bell peppers to the skillet.
Cook for 6 to 7 minutes until softened.
Stir in minced garlic and cook until fragrant.
Season with salt and pepper, then add ketchup, Worcestershire sauce, and mustard.
Stir the mixture until everything is well combined.
Mix in brown sugar, red wine vinegar, and chicken broth.
Reduce the heat and let the mixture simmer for 20 minutes.
Toast your buns on a separate pan or in the oven.
Spoon the meat mixture onto each bun before serving and enjoy!