Cut the onion and ginger into large pieces. If garlic is not cut, stir-fry onion, ginger and garlic in oil, then stir-fry with bean paste, cut beef into pieces (not too small according to personal preference), put carrots and tomatoes in the pot, stir-fry with onion, ginger and garlic for about two minutes. Add soy sauce and hot water, and put all the materials into the electric furnace.