Step 1

Heat oven to 325°F. Spray 12x8-inch (2-quart) glass baking dish with cooking spray. In 8-inch skillet, melt butter over medium heat. Add bell pepper and onion; cook 2 to 3 minutes, stirring occasionally, until tender.

Step 2

In large bowl, beat eggs, sour cream, salt and pepper with wire whisk until well blended. Stir in bell pepper mixture and cheese. Pour into baking dish.

Step 3

Bake uncovered 20 to 25 minutes or until eggs are set. Cut omelet into squares to serve.