how to store onions after slicing
Place cut onions in an airtight container as soon as possible after it is cut, and store it in the refrigerator for 3 to 5 days. To freeze, wrap the onions tightly in plastic wrap or aluminum foil, and place in an airtight freezer bag. They will keep for up to a year. Photo via CakeSpy.
Q: After I cut or use part of an onion, how long will it keep? A: Chopped or sliced onions can be stored in a sealed container in your refrigerator at the proper temperature of 40Â°F or below for 7 to 10 days (Source: USDA). For pre-cut fresh or frozen products, always use and follow manufactures use by dates.