Season your cleaned/washed oxtails with adobo, cayenne pepper, garlic powder and salt and pepper. Add jerk seasoning (optional). Pour the green seasoning all over and 2 tbsp of browning. Mix everything thoroughly.
Add all your vegetables and mix again. Add 1 tbs of browning. Once you're done blending the seasoning to your meat, cover and let it marinate in the refrigerator for 5-7 hours.
Start cooking your oxtails. Add oil to your pot and braise your oxtails slowly on low heat until they're nice and brown. Constantly rotate them to make sure they cook evenly.
Once they're nice and brown, turn up the heat and add about 4 cups of water. Add the vegetables you set aside and allow into slight boil over on medium heat. Cover your pot and let cook for about 2 hours.
After your oxtail is cooked, prepare your sauce. Mix the soy sauce, ketchup, and brown sugar.
Add the sauce to your oxtail. Cover your pot and cook for another 15 minutes. After 15 minutes, add the butterbean and stir it. Cook for another 15 minutes and you're all done!