Heat
oil in a large skillet. Add onion, garlic, green pepper
and celery. Cook and stir over medium heat until tender.
Add
chili powder to the saucepan and cook for 30 seconds.
Add tomatoes and oregano. Break
up any large pieces of tomato. Simmer for 5 to 7 minutes
until slightly thickened.
Break
eggs into sauce. Cover and cook until egg whites are
set.
Sprinkle
cheese over eggs and season with salt and pepper. Cover
and cook until cheese is melted. Makes 4 servings.