Wash your oxtail with vinegar.
Marinate the meat with your seasonings (rosemary, thyme, paprika, salt, bouillon cube, onions, bell peppers, dark sauce, oyster sauce, ginger, garlic, onion & pepper blend).
In a large saucepan, heat 2 tablespoons of olive oil on medium-high heat.
Sauté your oxtail.
Stir frequently while scraping any browned bits off the bottom of the saucepan until the pieces are browned. This should take about 10 minutes.
Pour enough water to cover the oxtail.
Adjust the heat setting and bring to a simmer.
Reduce the heat to low, cover and cook for 3 hours, until the meat is tender.
Serve as desired