1. Prepare materials. Mustard heads are the stems of large mustard greens without leaves.
2. Wash the casserole and put the washed and cut mustard greens, sweet potatoes, meatballs, and fried tofu into the casserole.
3. Pour in clean water, it doesn't need too much, to half the position of the ingredients, the ingredients will be water after they are cooked, add a spoonful of cooking oil.
4. For the casserole, use a low heat first. When the water is boiling, increase the heat slightly. After the water is boiled, use a spoon to slide the fish into the pot and cover it to cook, turning it over from time to time. When the mustard greens are soft and the other ingredients are cooked, season with a little salt and serve.
Tips:Mustard greens and sweet potatoes are a fixed match, and other ingredients such as meatballs and fish paste can be matched at will.