Till the garden area where you plan on planting. Make a shallow ditch or furrow and lay the onions on one side of the ditch. I plant them 2 or 3 inches apart because I'll pull every other one to use as green onions when they get larger. To cover onions, push the dirt from the other side of the ditch on the onions. I walk along side the row an use my foot to push the dirt on the onions. The onions will straighten up as they start growing toward the sun. This process is easier than making a hole in the soil and pushing 2000 onions in the dirt.
If you have any gardening questions just send me a message. I've been doing this along time. I will be adding blog posts showing you what I'm doing in the garden so be sure and check back.