1 onion
4 or 5 tomatoes
3 cloves garlic
10 serrano peppers
Vegetable oil
Salt (to taste)
White pepper
1/2 c. water

Place all ingredients in skillet with enough oil to fry. Fry until well-cooked. Mash with potato masher until pureed. Add water and a dash of white pepper. Simmer 10 minutes.