Meat lover! If using protein, cook in a medium non-stick pan over medium-high heat with 2 tsp. olive oil. If using diced chicken, pat dry and season all over with a pinch of salt and pepper. Stir occasionally until chicken reaches minimum internal temperature, 5-7 minutes. If using Italian sausage, remove from casing and break into small pieces. Stir occasionally, breaking up sausage, until sausage reaches a minimum internal temperature of 160 degrees, 5-6 minutes. Add to casserole as desired.