How can I preserve the quality of fresh Brussels sprouts by freezing them?

To preserve the quality of fresh Brussels sprouts by freezing them, you should first blanch them in boiling water for a few minutes, then quickly cool them in ice water. After that, dry them thoroughly and place them in airtight containers or freezer bags before storing them in the freezer. This process helps to retain their flavor, texture, and nutrients when you're ready to use them.