Onions and Mushrooms

I love to buy the gigantic white onions just like restaurants use. I chop up a pound of mushrooms and two gigantic onions and sautee in olive oil in my 12" cast iron skillet. Then I add soy sauce and cheap Chianti which we buy in a jug and keep for this purpose. I add kosher salt if needed. We enjoy this on mashed potatoes, in omelets or on rice or noodles or as a base to a soup.