In a casserole, put the ruffle fat and season with salt. Let it boil for 20 minutes.
Then remove the boiled ruffle fat from the casserole and cut into 2-inch.
Rub the remaining salt all over the ruffled fat. Set aside.
In another cooking pot, heat oil and deep fry the ruffle fat until the texture becomes crisp and the color turns medium brown.
Remove it from the pot and place on a serving plate with paper towels to absorb the oil.
Serve with spiced vinegar.
Eat and enjoy!