Spicy Onion Sauce (Salsa Picante con Cebollas)

Ingredients

• onions (whole heads), peeled
• green ají (ají, a South American chili pepper)
• salted water
• tomato
• parsley
• pepper
• oregano
• 2 large tablespoons vinegar
• 1 tablespoon oil
• 3 green ají

Instructions

1. Boil peeled whole onions and green ají in salted water for half an hour.
2. Change the water; seed and wash the ají.
3. Give the ají and onion one more brief boil, then lift them from the water.
4. Mash them very fine, along with tomato and parsley.
5. Sprinkle with pepper and oregano; pour in two large tablespoons of vinegar and one of oil.
6. Place in the sauce boat with three green ají stood upright in the center to announce the heat.