Bring the chilies, tomatoes and 6 cups of water to a boil over medium high heat. Boil for 10 minutes.

Transfer the chilies, tomatoes and about 1/2 a cup of the water to a blender. Add the garlic clove and the piece of onion to the blender. Blend for a couple of minutes until you have a smooth sauce.

Heat up the 2 tablespoons of vegetable oil in a pot over medium heat. Once the oil is hot and sizzles add the sauce and let fry for a couple minutes. Season with a little salt to taste. Then reduce heat to low and simmer for about 10 minutes.

Make the tortilla chips while the sauce is simmering. When they're done put them all in the pot with the sauce. Stir to make sure they are all coated in sauce. Do it carefully so they don't break. Let them simmer for just a couple of minutes. Not too long or they will get soggy.

Serve the chilaquiles. Garnish with diced onion, cilantro and queso fresco.