If you are looking for roast beef with a home-cooked taste, look no farther than your supermarket’s lunch meat counter. Cooked on the premises, store-baked roast beef comes straight from your grocer’s oven -- sliced-to-order. Since the store takes care of most of the cooking, you spend less time in the kitchen. Purchase some homestyle gravy and rolls, and you have the makings for a hot roast beef sandwich that cooks in just a few minutes.
Pour one jar of beef gravy into a medium saucepan. Bring the gravy to a boil over medium-high heat on your stove top.
Remove the saucepan from the heat after boiling and place it on a trivet. Separate the sliced roast beef and add each piece individually to the hot gravy in the saucepan.
Slice the hard rolls or hero rolls in half using a sharp knife. Open the rolls and lay them on plates.
Remove the slices of roast beef from the gravy after two to three minutes using a fork and lay them one-by-one on the rolls until each sandwich is as thick with meat as you would like.
Scoop some gravy out of the saucepan with a ladle and pour some on top of each sandwich. Place the top of the roll on each sandwich. Serve.