Meatlovers! If adding protein, pat dry, season with a pinch of salt and pepper, and cook with 1 tsp. olive oil in a large non-stick pan over medium-high heat. If using steak strips or flank steak, separate into a single layer and pat dry. Stir occasionally until no pink remains and steak reaches minimum internal temperature, 4-6 minutes. Rest, 3 minutes. If using diced chicken breasts, stir occasionally until chicken reaches minimum internal temperature, 5-7 minutes. If using Italian sausage, remove from casing, if necessary. Break up until sausage reaches minimum internal temperature, 4-6 minutes. If using Beyond sausage, crumble into bite-sized pieces. Break up until sausage reaches a minimum internal temperature of 165 degrees, 4-6 minutes. Vegetarian sausage will not brown. Add to sandwich as desired.