Salsa de Aji (Ecuadorian Hot Salsa)

2   large tomatoes, seeds removed, finely chopped
1   medium onion, finely chopped 
1   tablespoon fresh cilantro, finely chopped
4   large Aji chiles, seeds and stems removed, chopped, or 4 large Yellow wax hot chiles, or 4 Jalapenos
1/2 cup water
    salt to taste

Combine the tomatoes, onion, and cilantro in a bowl. Place the chiles, water, and 3 tablespoons of the tomato, onion, cilantro mixture in a blender or food processor and puree until smooth. Add the chile puree to the remaining tomato mixture and mix well. Salt to taste.