Prepare the chilies: Remove the veins from the guajillo chilies, give them a light toast, then cook in water.
Chop and peel vegetables: Chop and peel the chayotes, carrots, squash, and potatoes.
Cook the vegetables: In a pot with heated water and a little salt, cook the chopped vegetables.
Grind the chilies: Once the chilies have cooled down, grind them with a piece of onion and two cloves of garlic.
Combine and cook: Strain the ground chili mixture into the pot with the vegetables. Add more water if needed and let it boil.
Add the shrimp and cilantro: Once the mixture has boiled, add the dry shrimp and cilantro. Let it cook until the shrimp and vegetables are well cooked.
Serve: Serve the broth hot, ideally with pancakes on the side for a complete meal.