Fluffy Oven Eggs and Bacon

1/2 lb Bacon (about 12 slices)
1/2 cup Chopped Onion
1/2 cup Bisquick
3 Eggs
1-1/4 cups Milk
1/4 tsp Salt
1/8 tsp Pepper
1/2 cup Shredded Cheddar or Swiss

Grease 1-1/2 qt. Round casserole. Cut bacon slices into thirds. Cook and stir bacon in 10 inch skillet over medium heat, until almost crisp. Add onion. Cook, stirring frequently, until bacon is crisp. Drain. Spread bacon and onion in bottom of casserole.

Beat Bisquick, eggs, milk, salt and pepper with whisk or fork until smooth. Slowly pour egg mixture over bacon; sprinkle with cheese.

Bake at 375 degree oven, uncovered, until knife inserted in center comes out clean, about 35 minutes. Serves 4 to 6.