Another idea:
Here's a 9-minute YouTube video from MerryMabelMarket that is no-nonsense, quick, and fun to watch. She's making 6 1/2 inch color-block squares:
Reflections on the books, poems, short stories, cereal boxes and small print I'm currently reading AND the films I'm getting to see upon occasion. . . .
Another idea:
Step 1: Wash and dry your celery well.
Step 2: Chop into the desired size and shape. I like to cut my celery into the size I most often use for soup or stir-fry recipes so I don’t have to try to cut it later.
Step 3: Place the celery in a single layer on a baking sheet. Transfer the baking sheet to the freezer. This step prevents the pieces of celery from freezing together in clusters.
Step 4: Once frozen solid (usually 2-3 hours), transfer the celery to a freezer safe container to use within a month or two.
If you want to have your frozen celery good for up to a year, you will need to do a quick blanch on them. To do this, place slice celery in boiling water for 2 minutes, remove with a slotted spoon and transfer to an ice bath to stop the cooking process. Then follow the above steps for freezing it. Blanched celery will last for up to 12 months in the freezer.
Freezing Onions is practically the same: