Ham and Cheese Sliders

Name: Ham and Cheese Sliders
Ingredients: Nonstick cooking spray, for the pan; One 12-ounce package Hawaiian rolls; 3 tablespoons Dijon mustard; 2 tablespoons mayonnaise; 1/4 teaspoon cayenne pepper; Kosher salt; 12 thin slices honey ham (10 to 11 ounces); 12 thin slices Swiss cheese (8 to 10 ounces); 4 tablespoons unsalted butter, melted; 1 1/4 teaspoons poppy seeds; 1 teaspoon brown sugar; 1 teaspoon granulated garlic; 1/2 teaspoon Worcestershire sauce; 1 teaspoon onion flakes; 12 dill pickles slices