In a 10x6x2 dish (use something smaller than a 9x13 if you don't have this exact size) place slices potatoes and onion.
Sprinkle with salt and pepper, then add milk, corn, green pepper and smoked sausage.
Top with shredded cheese and bake at 350 degrees, covered with foil, for 45 minutes and then uncovered for 15 mins.