Preheat oven to 480°F.
Halve the buns each, and assemble burgers by layering each with ½ tbsp pizza sauce, 2 K&N's Mortadella Slices (mildly thawed as per instructions on label), onion ring, tomato slice, bell pepper ring, mushroom slice and 1 tbsp pizza cheese.
Bake in the preheated oven for 3-4 minutes and serve with a dip of your choice.