What DIY can I do with onions?

Cook them in a white sauce. Cook them with peas. Cut them up and use them in a casserole instead of regular onions.

With the colder weather approaching, make onion sou.

Pickle them, they are delicious

French onion soup, saute them brown and put on top of casseroles for crunchiness

I chop extra onions and/or green peppers up when I have too many or they are close to going bad. Then I freeze them flat on a wax paper covered cookie sheet to keep them from sticking together. When they are frozen, I put them in quart or even gallon freezer bags and keep them in the freezer until I need them. They really come in handy when I want to make something like a veggie omelet or homemade soup or goulash. You can take out just what you need then put the rest back in the freezer.

Chop them up and dry or freeze them.

To dehydrat onions, if you don’t have a dehydrator, spread them on a parchment paper lined cookie sheet and put in oven with just the pilot light on. When they are all dry put in sealed container to store .

To freeze onions, spread on parchment paper lined cookie sheet and place in freezer until frozen. Then put into freezer container and store in freezer.

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You can pickle them, as well. Here is a link if you're interested in trying https://www.thespruce.com/easy-pickled-onions-recipe-435765

Use them like mild regular onions.

Do you have internet access they have tons of recipes

Pickle them!

http://allrecipes.com/recipe/103178/traditional-english-pickled-onions/

Chop them up and then freeze them on parchment paper thats on a cookie sheet (prevents them from sticking together) when frozen pop into a ziplock bag and keep in freezer until needed , then remove the amount needed.