When you run out a pantry staple, it's easy to say "put it on the list and I'll get it next time I go to the grocery store." I know I have been guilty of buying something that I know I could have easily made, but because of convenience I bought it anyway. But with that goes good money out the window. Now I realize not everything can easily be "re-created" at home, but there are lots of things that you can make.
Dehydrated onions take up less storage space & will keep for a long time. Due to the strong smell of onions, it's advisable not to do any other produce at the same time!
To turn your dried onion into flakes or powder, put them into a food processor or blender & process until ground into the desired size. To create onion salt, mix equal parts salt with finely ground onion powder.
Place in an airtight container & store in a dry, dark & cool place.