Brown ground beef in a large skillet over medium-high heat. Drain off any excess grease.
Add onion and green bell pepper to the skillet and cook until softened, about 5 minutes.
Stir in tomato sauce, ketchup, brown sugar, mustard, and Worcestershire sauce. Bring to a simmer and cook for 10-15 minutes, or until the sauce has thickened.
Serve the Sloppy Joe mixture on Texas toast.
Notes
For extra flavor, try adding a pinch of garlic powder or onion powder to the Sloppy Joe mixture. You can also serve this with a side of your favorite chips or coleslaw.