Waist flower, or waist, if not specified usually refers to pork loin (pig kidney), because it is cut in the process of cutting more like a flower-like shape, so called waist flower.
The pork loin, also known as pig kidney, is used to deal with urine, which inevitably has a fishy odor. If not handled well, the resulting cashew flower will be very fishy. Before cooking, you can cut the pork loin in half, remove the white fascia, remove the main source of fishy flavor, rinse it well and put it into the water with white vinegar, soak it for 20 minutes, the pork loin whitened and swelled and then fished out and rinsed out and you can cook it.
Expanded Information:
The following is the specific steps to cut the cashew flower:
The first step: first cut the pork waist in half.
Step 2: Remove the white substance from the center of the pork loin.
Step 3: Cut the pork loin diagonally at three-quarters of the thickness of the falling knife in order, but do not cut it off directly, so you can slow down the movement a bit.
The fourth step: after cutting diagonally, change to a positive cut.
Step 5: every four cuts are cut off once.
Sixth step: break out of the waist, is what we usually called waist flower.