The Cuban Sandwich or Cubano

Ingredients

• 4 (6-inch) soft submarine rolls, halved lengthwise
• 2 tablespoons mayonnaise
• 4 teaspoons spicy brown mustard
• 1/4 pound thinly sliced ham, preferably Virginia or Black Forest
• 10 ounces thinly sliced roast pork
• 1/3 cup chopped dill pickles
• 1/3 cup chopped jarred banana peppers
• 1/4 pound deli-sliced Swiss cheese
• 2 tablespoons unsalted butter, melted