Directions
Combine olives, capers, peppers, parsley, giardiniera, and garlic in the bowl of a food processor. Pulse to chop until no pieces larger than 1/2-inch remain. Transfer to a bowl. Add vinegar and olive oil and stir to combine. For best results, let olive salad rest overnight before continuing. Split muffuletta roll in half and spread each cut surface generously with olive salad, making sure to include the juices when spreading. Layer half of soppressata on bottom half of bun, followed by half of mortadella, half of capicola, and half of provolone. Repeat layers with remaining meat and cheese. Close sandwiches and press down gently to compress. Cut into wedges to serve.
Ingredients
3/4 cup pitted mixed oil-packed olives
1 tablespoon capers
1/4 cup chopped roasted red peppers
2 tablespoons parsley leaves
1/2 cup giardiniera (Italian-style pickled vegetable salad)
1 medium garlic clove, minced
1 tablespoon red wine vinegar
3 tablespoons extra-virgin olive oil
1 large muffuletta-style roll
1/3 pound thinly sliced sweet soppressata
1/3 pound thinly sliced mortadella
1/3 pound thinly sliced capicola
1/3 pound thinly sliced provolone cheese