Swiss Popcorn

1/2 pound bacon, chopped
1/2 cup chopped onion
3 quarts popped popcorn
1/4 teaspoon coarsely ground pepper
1 cup finely shredded Swiss cheese

Heat oven to 300 degrees F.

Cook bacon and onion in skillet until bacon is crisp. Drain off all but 1 tablespoon fat. Add to popped pop corn with pepper and Swiss cheese. Spread pop corn on foil-lined shallow baking sheet. Heat for 5 to 7 minutes or until cheese is melted. Serve immediately.