Ham and Swiss Sliders

Ingredients (12)

• baking spray
• 12 Hawaiian dinner rolls
• 24 slices deli ham
• 8 slices Swiss cheese
• ¼ cup mayonnaise
• 8 tbsp unsalted butter
• 1 tbsp poppy seeds
• 1 tbsp Dijon mustard
• 1 tsp onion powder
• 1 tsp Worcestershire sauce
• ¼ tsp Kosher salt
• ¼ tsp black pepper