Mel's Mini Ham and Swiss Sandwiches

Why I Love This Recipe
This recipe came from a co-worker many years ago. My family and friends have enjoyed it many times and I hope yours will too.
Submitted by: "Melanie Oliver"
Ingredients You'll Need
1/2 to 3/4# shaved ham
12 dinner rolls
Grated Swiss cheese
2 Tbsp. prepared mustard
1 stick butter
1 Tbsp. dried onion flakes
1 1/2 Tbsp. Worcestershire sauce
Directions
Cut dinner rolls into tops and bottoms. Spread bottoms in greased 9x13 pan. Put shaved ham over bottoms. Spread grated Swiss over ham then put the tops back on the sandwiches. In separate bowl, mix melted butter, mustard, onion flakes and Worcestershire sauce. Drizzle/spread the mixture evenly over the tops of the sandwiches. Bake at 350 - covered for 10-15 minutes, then uncovered for 10-15 minutes.