Step 1: Wash the sweet potato;

Step two, peeling;

Step three, cut into large pieces;

Fourthly, putting into a steamer;

Step 5, steaming with high fire for 15 minutes until it is completely cooked;

Step 6, cool slightly, take it out and put it on the grill;

Step 7, put it in a sunny and ventilated place;

Step 8, Sun and Sun;

Step 9, only bask in the dry humidity you like.