1For each sandwich, spread one cut side of each bun with 1/2 teaspoon mustard and the other side with 1 teaspoon mayonnaise. Layer pork, ham, cheese and 3 pickle slices in each bun, folding meats or cheese to fit if necessary. Press sandwiches firmly with palm of hand to flatten to about 1-inch thickness.
2Heat 12-inch nonstick skillet over medium-high heat. Brush tops of sandwiches with melted butter. Place sandwiches, buttered sides down, in skillet. Brush bottoms with remaining butter. Cook about 6 minutes, turning once, until crisp and brown on both sides.