1Cut the pork roast into thin slices and remove the membrane from the baby back ribs and cut them into smaller portions.
2Place the meat in a bowl and season with 1 tablespoon of salt and 1 tablespoon of seasoning. Add 2 1/2 cups of white vinegar to cover the meat and refrigerate for 8 to 12 hours to cure.
3Roast the tomatoes, onions, garlic, bell pepper, chile pasilla, chile guaque, and chile guaque on a griddle until charred.
4In a pan, toast the pepitoria, then add cinnamon stick and sesame seeds until golden. Remove from heat.
5Peel the roasted tomatoes and peppers, then place them in a blender with the onions, garlic, toasted spices, black pepper, thyme, bay leaves, oregano, cloves, a pinch of cumin, and achiote for color. Blend until smooth.
6Heat a little lard in a pan and add the blended sauce. Stir in 1 tablespoon of chicken bouillon, a pinch of salt, and a splash of vinegar. Simmer for 15 minutes until thickened.
7Remove the meat from the vinegar, season with 1 tablespoon of chicken bouillon and achiote, then massage in the prepared sauce. Let marinate for at least 3 days in the refrigerator for best results.