Step 1. Prepare glutinous rice, yam, medlar, black sesame and rock sugar to cook porridge. 2. Peel and wash the yam and cut it into small pieces. 3. Wash the glutinous rice and put it in the casserole with the yam. Bring the fire to the boil and stew for 20 minutes. 4. Add rock sugar and cook for 5 minutes. 5. Add Lycium barbarum and cook for 5 minutes. 6. Pour in black sesame seeds and cook for 5 minutes. 7. Leave the cooked porridge for a while. 8. Prepare 150g whole wheat flour and dry yeast. 9. Mix the yeast with warm water and pour it into the flour. 10. Beat the eggs and stir them into a smooth dough. 1 1. Fermentation in a warm place. 12. The dough is twice as big. 13. The dough is vented and divided into two parts; Take two small bowls, put oil on the outside, and wrap the bowls with dough; 20 minutes. 14. Put the steamed bowl embryo of wheat into the pot and steam for 15 minutes. 15. Take out the steamed wheat bowl and serve it with yam porridge.