In large mixing bowl combine eggs and milk with Club House Italiano One Step Seasoning. Reserve. Assemble sandwich in the following order: butter inside of each slice of bread Mortadella red onion Provolone and julienne roasted peppers. Top with bread. Dip sandwiches in egg mixture. Place in large skillet and sear both sides of the sandwich on medium heat with vegetable oil until golden brown. Place seared sandwich on baking tray lined with parchment paper. Bake sandwich in a 350°F (180°C Gas Mark 4) oven for 8 to 10 minutes or until internal temperature reaches 165°F (74°C).