I've had it in a restaurant. I'm very impressed. I've made it very successful today. It's delicious and convenient to make.
Step1:Wash mustard and cut into small pieces. Peel and cut sweet potato into piece
Step2:Put ginger slices and sweet potato into the boiling water and boil over high heat, then turn to medium heat and cook for 15 minutes
Step3:Pour in vegetable oil. Add mustard and salt and chicken essence to taste
Cooking tips:Sweet potatoes are good to buy. Mustard in water is better than sweet and delicious.