ONION TORTILLA OR OMELETTE

• 1 lb. yellow onions
• 1-1/2 oz. butter or oil
• 3 eggs 
• salt and pepper

Slice the onions. Melt the butter in a frying pan, and fry the onions for 10 or 15 minutes. Beat the eggs, add them to the onions, season with salt and pepper. Fry the tortilla a light brown on both sides.