Party food: Hot Ham & Cheese Party Rolls

Ingredients
Meat
3/4 lb Deli ham
Condiments
1 tbsp Dijon mustard
1 tbsp Worcestershire sauce
Baking & Spices
2 tbsp Brown sugar
1 tbsp Poppy seeds
Bread & Baked Goods
1 can Pillsbury classic pizza crust, refrigerated
Dairy
1/2 cup Butter
12 slices Swiss cheese