Heat oil in caldero or large pot. Meanwhile, season chicken with seasonings to taste. Brown chicken on all sides, then remove from pan.Add sofrito and sauté until soft and fragrant, about 3 minutes. Add tomato sauce and bring to a simmer. Add packet of Sazón, olives, potatoes, zucchini and water or stock. Use more or less water depending how soupy you like it. Season broth liberally with same seasonings used to season chicken. Bring to a boil then taste, broth should taste bold and salty.Add chicken back to pot, lower heat, cover and simmer until cooked through, about 30-45 minutes. Serve over white rice.