In a large saucepan, deep fry the tortilla pieces in batches. Salt them halfway through. Once browned and crisp, transfer to a bowl lined with paper towels.
Drain the oil from the pan, leaving about 1 teaspoon. Turn the heat to medium-low and sauté the spring onions, stirring occasionally, for about 2 minutes.
Add the tortilla pieces back to the pan and mix them with the onions, fry for another 2 minutes, stirring constantly. Remove from pan and place in a bowl.
In a blender, place the dried chilis, garlic, cloves, and a cup of water, plus some salt, and blend until combined.
Pour the chili sauce into the pan through a colander. Turn on the heat to medium-low to start simmering the chili sauce.
Add the roasted tomato and green tomatoes to the blender and pulse until salsa-like. Pour the tomato sauce in the pan, season with salt, and let simmer for about 10 minutes.
Add the fried tortilla pieces and green onions to the sauce, stir and let them boil for 3-5 minutes. Don’t go over 5 minutes.
Turn off the heat, sprinkle grated cheese on top, and let it melt. Serve the chilaquiles with toppings of choice.