Trim off any excess fat on the oxtail.
Rinse oxtail under cold water and let soak for 20 minutes to draw out any excess blood.
Drain and pat dry with paper towels.
Press the “Saute” button on your Instant Pot. (Note: If you are not using an Instant Pot, a large pot will do.) If you're using an old school pressure cooker or large pot then just bring the oil to a medium-high heat.
Once hot, add oil to the bottom of your Instant Pot. In batches, sear the oxtail on all sides until golden brown. (Stovetop: In a large pot over medium high heat, sear the oxtail on all sides until golden brown.)
In a blender, combine all the braising ingredients until it becomes a liquid. Do not worry about the sauce separating.
Add the cubed daikon radish, carrots and remaining onion.
Add the remaining chicken stock (if you hadn’t already added ALL OF IT prior to blending)
Stir and cover with the lid. Cook until the meat easily pulls away from the bone *see cooking notes in step #10 #11 and #12.
Instant pot: Once covered, set to the “Meat” function and increase the cooking time to 45mins. Allow the instant pot to slowly release the pressure and once the meat is tender, remove the vegetables. Set to “Sauté” function and reduce the sauce until thickened.
Pressure cooker: Once covered, cook for 2-2 1/2 hours on medium heat, stirring every 45mins to ensure it doesn’t stick to the base. Increase the liquid by a cup or 2 of water if needed. After the 2-2 1/2 hour period is should be perfect. No need to reduce the sauce.
Regular stove top: Once covered, cook for approximately 2 hours. Stirring every 45mins ensuring it doesn’t stick to the base. Add 1-2 cups of water if needed. Again, you shouldn’t need to reduce the gravy towards the end.
Salt to taste before serving