Adjust oven rack to lower-middle position and heat oven to 350 degrees. Lay naan directly on wrack and heat until warm and starting to crisp, 5 to 6 minutes.
Spread each naan with ½ cup of the Mixed Olive Salad. Layer in the following order: pepperoni, mozzarella, capicola, red onion, provolone, salami. Cap to make a large sandwich. Trim edges to form an approximate 8- by 6-inch rectangle. Time permitting, wrap sandwich tightly in plastic wrap and refrigerate. Cut into bite-size squares and serve.
Recipe by Three Many Cooks at https://threemanycooks.com/recipes/nibbles-and-apps/mini-muffaletta-squares/