– Cut the spare ribs in small pieces and place in a saucepan. Cover with the water and add the ¼ onion, one garlic clove, and the bay leaf. Bring water to a boil, and then reduce the heat to simmer. Cook for about 40 minutes until meat is tender and the water has reduced. The meat will start to brown with its own fat.
– Meanwhile, roast the tomatillos, peppers, ⅓ onion, and garlic cloves. These two last ones need to be removed quickly since they take less time to roast. Place all these ingredients in a large piece of aluminum foil and wrap them so they keep cooking in their own steam for about 5 minutes.
– Place the roasted vegetables and chopped cilantro in your blender and process until you have a smooth salsa.
– Once the meat is cooked and lightly browned, pour the sauce into the pan. Season with salt and pepper and bring to a boil. Stir in the nopales and reduce the heat to simmer for about 7-8 minutes.