Quick-frozen preserved broccoli

When quick-freezing, the flower ball should be pre-cooled and then cleaned to remove dust from the surface. Foreign bodies and pesticides. Then cut into small pieces, soak in a salt pool with a concentration of 2% for 10 minutes for 15 minutes, rinse in clean water, then blanch in boiling water above 95 ℃, rinse and cool immediately in cold water of 3: 5 ℃, then fish into bamboo baskets or water removers to drain water. Packed in plastic bags, 0.5 kilograms without bags, packed in corrugated cartons of 20 to 25 kilograms each, and sent to the freezer until the temperature reaches 18 ℃. After freezing, put it in the refrigerator, indoor, ice water or warm water to slowly thaw, and then cook.