Preheat oven to 350°F (175°C).

Grease a 9-inch pie plate.

Sprinkle cooked bacon, shredded Swiss cheese, and chopped onion evenly in the pie plate.

In a blender, combine eggs, milk, pepper, and Bisquick.

Beat on high speed for 15 seconds, or whisk/beat by hand until smooth.

Pour the mixture into the pie plate over the bacon, cheese, and onion.

Bake for 35 to 40 minutes, or until a knife inserted in the center comes out clean.

Let cool for 5 minutes before cutting into wedges and serving.