Add butter to a large skillet or dutch oven over medium high heat. Add ground beef and cook until brown. Drain most of the fat and discard.
Add onions, green pepper, and garlic. Cook for a few minutes, or until vegetables begin to get soft.
Add ketchup, brown sugar, chili pepper, dry mustard, and water. Stir to combine and simmer for 15 minutes, adding salt and pepper to taste. Also add tomato paste, Worcestershire, and Tabasco if desired. Taste and adjust seasonings as needed.
Spread rolls with butter and brown on a griddle or skillet. Spoon meat mixture over the rolls,serve with kettle chips.
Adapted from The Pioneer Woman (except she uses beef!)