03Place each sandwich on a preheated panini press and grill until the bread is toasted and the cheese begins to melt, about 5 minutes. Alternately, preheat a dry cast iron or non-stick pan. Place the sandwich in the pan and weight it down with another pan or a clean brick wrapped in foil. Grill 5 minutes, turn the sandwich over, re-weight it, and grill for another 5 minutes. Serve immediately.