Meanwhile, cook the tomatoes and the seeded guajillo chile (to taste). Once cooked, blend them with some chipotle chiles, the quarter onion, garlic clove, and a pinch of salt.

Once blended, heat a little oil in a pot and pour in the blended mixture. Sauté briefly, then add water and bring to a boil. If you like, you can add a chicken bouillon cube. Once it boils, it's ready to serve.