Step 1

Warm oil in a large nonstick skillet over medium-high heat. Add beef, onion, and bell pepper; breaking up the meat into crumbles with a wooden spoon. Cook for about 5 minutes until beef is cooked through and vegetables are tender. Stir in garlic and cook until fragrant, about 30 seconds. Drain off grease.

Step 2

Stir in tomato paste until thoroughly combined.

Step 3

Add in ketchup, water, brown sugar, Worcestershire, mustard, salt, pepper, and red pepper flakes. Stir well to combine.

Step 4

Cook over medium heat for 10 minutes until mixture has thickened.

Step 5

Remove from heat and serve on toasted buns and enjoy!