1/3 cup catsup
2 tablespoon vinegar
2 tablespoon finely chopped onion
1 finely chopped garlic clove
1 1/2 teaspoon worcestershire sauce
1 teaspoon packed brown sugar
1/8 teaspoon dry mustard
1 dash pepper
2 cup cut-up cooked beef
4 french rolls, split
4 slices american cheese
Mix all ingredients except beef, rolls and cheese in 1-Qt casserole. Cover and microwave on high (100%) util hot and bubbly, 2 to 3 minutes; stir. Mix beef into sauce. Cover and microwave until beef is hot, 3 to 5 minutes Fill rolls with beef mixture and cheese slices and serve.