Season the cleaned and washed oxtails with adobo, cayenne pepper, garlic powder, salt, and pepper. Optional: add jerk seasoning as well.
Pour green seasoning over the oxtails and add 2 tablespoons of browning. Mix everything together thoroughly.
Add all vegetables to the mixture and mix again. Add 1 tablespoon of browning.
Cover the oxtail mixture and let it marinate in the refrigerator for 2-4 hours or overnight.
Heat some oil in a pot and braise the oxtails slowly on low heat until they are nicely browned. Rotate the oxtails constantly to ensure even cooking.
Once the oxtails are browned, increase the heat and add approximately 4 cups of water to the pot. Add the reserved vegetables and bring the mixture to a slight boil over medium heat.
Cover the pot and let the oxtails cook for about 1 hour.
After the oxtails are cooked, prepare the sauce by mixing together soy sauce, ketchup, and brown sugar. Add the sauce to the oxtails and cover the pot. Cook for an additional 15 minutes.
After 15 minutes, add the butterbeans and stir. Cook for an additional 15 minutes and the dish is ready to serve.