dried ancho chiles • dried guajillo chiles • onion (1/4 for the sauce, 1/4 for the meatballs) • cumin • medium tomatoes or 4 large tomatoes • garlic clove • ground meat (beef and pork mix, about 500 grams) • raw egg • hard-boiled eggs • of a bag of breadcrumbs (about 1/2 cup or 60 grams) • oil • salt