1. Peel off the dead skin of onion and cut it into small pieces.

2. Pour lard into the pan and heat the oil pan to about 80℃.

3. Cook the red onion in small batches to avoid too much oil in the pan at one time, then turn on medium heat and stir-fry the red onion with a spatula to avoid frying.

4. Stir-fry the red onion until it turns yellow, and then turn to low heat. Stir-fry until it is slightly yellow, and then pick it up. After draining the oil, spread the fried red onion evenly and cool it, and then mix it with the oil.