Wash the tomatoes for the filling. Dice mozzarella and tomatoes. Grate parmesan. Wash the sage, shake dry, pluck leaves from the stalks and chop finely, except for a little to garnish. Mix the prepared ingredients, season with salt and pepper
Cut the rolls in half horizontally and distribute the prepared filling into the rolls. Grill the rolls in a hot grill pan in portions for approx. 8 minutes each while turning. Weigh down with a heavy pan or pot