Place the mozzarella atop 1 bread slice. Sprinkle with salt and pepper. Add the tomato slices and then the basil
leaves. Top with the second bread slice. Brush both sides of the sandwich with the oil.
Heat a grill pan
over medium-low heat. Grill the sandwich until the bread is golden brown and the cheese
melts, pressing down with a metal spatula
or grill press, about 4 minutes per side.