Add 2 liters of water, chicken breasts, parsley, cilantro, and whole green onion with roots trimmed slightly.
Add the yucca pieces, corn, potatoes, and plantains to the pot. Bring to a boil, cover, and cook for 30 minutes.
Make the guiso: In a pan, heat a touch of oil over medium heat. Add diced onion and cook for 2 minutes.
Once soup is done, shred the cooked chicken and add it back to the pot along with the guiso mixture.
Serve hot, garnished with chopped cilantro or green onions if desired.