Heat oven to 350°F. In 12-inch ovenproof skillet, heat oil over medium-high heat. Cook bell pepper and onion in oil 3 to 5 minutes, stirring frequently, until tender.
In large bowl, beat eggs and milk with whisk; stir in salt, pepper and 1 cup of the cheese. Add bacon and ham to pepper and onion mixture in skillet, spreading evenly over bottom of skillet. Pour egg mixture into skillet; top with remaining 1/2 cup cheese.
Bake 32 to 37 minutes or until just set and knife inserted near center comes out clean. Let stand 10 minutes before serving.