Makes 2 Panini 1 Beef Sirloin, seasoned and grilled to taste, sliced thin 1/2 Onion, sliced thin (optional, we chose to caramelize our onions prior to placing them in the sandwich, you could keep them raw if desired) 4 Slices Thin Sliced Provolone Cheese 2 Packages Bel Gioioso Fresh Mozzarella 70 Calorie Snacking Cheese, cutting each small ball in half […]