I first chop the onions in small rings (the same size I would use in a recipe), layer between sheets of paper toweling, put in the microwave for intervals of 30 seconds until they seem dry, then place them in small freezer bags.
Harvest wild onions for use during the year. You can also buy green onions at the store and cut off the tops and plant the bulbs in your garden. They will continue to grow each year so long as you do not remove the bulb.
I use a box flat that I get for free from the local store. Place the green onions in the flat. Place in your car in the summer months and they dry in no time and perfectly.
