Muffaletta Panini

Name: Muffaletta Panini
Ingredients: 1 cup sliced olives, (I use a mixture of green and kalamata); 1/4 cup finely diced red onion; 1/2 cup chopped marinated artichoke hearts; 1/2 cup chopped roasted red pepper; 2 garlic cloves, (minced); 1/4 teaspoon crushed red pepper flakes; 1/2 teaspoon oregano; 2 tablespoons Olive Oil; 1 tablespoon red wine vinegar; salt and pepper to taste; 8 slices French or Italian bread (or use ciabatta but cut horizontally); 12 slices provolone cheese; 1/2 pound thinly sliced salami, (I use genoa); 1/2 pound Mortadella; 1/2 pound Capicola or prosciutto; more Pompeian Olive oil for bread