ham and cheese sliders recipe

Ingredients: 12 slider rolls (Hawaiian rolls work great) 12 slices of ham (about 1 pound) 12 slices of Swiss cheese 1/2 cup (1 stick) butter, melted 1 tablespoon Dijon mustard 1 tablespoon Worcestershire sauce 1 tablespoon poppy seeds (optional) 1 teaspoon garlic powder 1 teaspoon onion powder