Savory Oxtail in a rich and thick gravy.

Savory Oxtail in a rich and thick gravy. 2 lbs oxtail cut and trimmed into 1-2 inch pieces 1 tomato diced 1 onion sliced thin 1 stalk celery diced black pepper (fresh ground is best) 1/4 teaspoon hot pepper (I used 1/2 habanero) this is optional 1 tablespoon green seasoning 1/2 teaspoon prepared mustard (nothing…