In a large frying pan or saucepan over medium high heat, heat oil. Saute green bell pepper, onion, and turkey in oil, breaking up turkey, until turkey is cooked through and vegetables are softened. Add Manwich and stir well until combined.
Meanwhile, spread out pizza crust onto a greased baking sheet. (Mine was a rectangle, about 10 inches by 13 inches). Bake the crust for 8 minutes.
Remove from oven and top with Manwich mixture. Spread evenly over crust. Sprinkle with cheese and return to oven for 8-10 minutes more or until cheese is melted and crust is golden brown.