Heat a soup pot over medium heat and add the butter and oil. Slice one of the onions as thinly as possible.
1 tablespoon butter, 1 tablespoon coconut oil, 2 large sweet onions, 2 red onions
Add them to the pot and sprinkle a little salt.
Repeat with each onion, layering them with a pinch of salt in the pot.
Once finished, stir them all together and let them slowly cook over medium to medium-low heat for at least 1 hour, stirring about every 20 minutes.
After an hour the onions will have reduced and darkened in color. At this point I decided to use the pound of mushrooms I got in my farm share.
1 lb mushrooms
I roughly chopped them and added to the onions with the 1 cup of wine.
1 cup good quality red wine
I let the mushrooms and wine cook down for about 10 minute before adding the beef broth.
32 oz 1 carton beef broth
After adding the beef broth, I brought everything to a boil and then lowered to a simmer until I was ready to serve.