Preheat oven to 350 degrees.
In a skillet, heat 1 tablespoon butter and add in onions.
Cook onions until browned and caramelized.
Stir in the worcestershire sauce and set aside.
Slice all the rolls in half horizontally.
Place the bottom half of the rolls onto a cookie sheet.
Top bottom half of rolls with roast beef.
Spread caramelized onions evenly over beef, followed by the grated cheese.
Place the top of rolls on top to create sandwiches.
Melt remaining 1 tablespoon butter in a small bowl and brush the butter on top of the sandwiches.
Sprinkle garlic/onion, seasoning on top of the sandwiches and cover cookie sheet lightly with aluminum foil.
Place cookie sheet into preheated oven and bake for about 15 minutes.
Remove foil and cook an additional 5 minutes.
Remove from oven and serve! Enjoy!