Pulled Pork Cubano

Name: Pulled Pork Cubano
Ingredients: 2 tablespoons mayonnaise; 1 1/2 tablespoons orange marmalade; 1 teaspoon fresh oregano; One 12-inch loaf Cuban bread, or two 6-inch soft Italian rolls; 6 slices deli ham (about 4 ounces); 1 kosher dill pickle, sliced thinly lengthwise; 6 slices Swiss cheese (about 4 ounces); 1 cup Pulled Pork, recipe follows or store-bought; 2 tablespoons Dijon mustard; 2 tablespoons unsalted butter; One 3-pound pork butt, bone-in; 1 1/2 cups chicken broth; 2 tablespoons balsamic vinegar; 2 cloves garlic; 1 bay leaf; 1/2 small onion