I often buy a whole bag of green onions or sweet onions or garlic and don't use all of it. I don't like letting things go to waste OR I find a REALLY good deal and I want to stoke up but veggies don't last. SOOOO, I freeze them.
So far in the last couple months I have gotten garlic, green onions, green, red and yellow bell peppers, sweet onions, red onions and strawberries.
How do I do it? I cut them into pieces, or with garlic I separate them and put them on some tinfoil (pictured below) put them in my freezer for about 5 hours and then take them off and put them in freezer bags or ziplocks. Stick em in your freezer and use them as you need. I LOVE THIS!