1/3 c  Catsup
2 tb Finely Chopped Onion
1 1/2 ts Worcestershire Sauce
1/8 ts Dry Mustard
2 c  Cut-up Cooked Beef
4    Slices American Cheese
2 tb Vinegar
1    Finely Chopped Garlic Clove
1 ts Packed Brown Sugar
1    Dash Pepper
4    French Rolls, Split

Mix all ingredients except beef, rolls and cheese in 1-Qt casserole. Cover
and e 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.