Peel and grate the green bananas, plantains, and yautía. Set aside.
Heat achiote oil in a large pot over medium-high heat. Brown the meat on all sides (5-7 minutes). Remove and set aside.
In the same pot, sauté onion and garlic until soft (3-4 minutes).
Add sofrito, oregano, cumin, salt, and pepper. Cook 2-3 minutes.
Return meat to the pot. Add grated vegetables and mix well.
Pour in broth until ingredients are just covered. Stir in olives and capers. Bring to boil, then reduce heat to low. Cover and simmer 45 minutes to 1 hour until meat is tender.
Taste and adjust seasoning.
Serve garnished with fresh cilantro if desired.