HEAT oven to 350°F.
HEAT oil in 10-inch ovenproof skillet on medium-high heat. Add green peppers and onions; cook 2 min., stirring occasionally. Add potatoes, sausage and seasonings; stir. Cook 3 min., stirring occasionally. Remove from heat; top with cheese.
WHISK eggs and milk until blended; pour over ingredients in skillet.
BAKE 45 min. or until knife inserted in center comes out clean.