Saute onions until they start to turn translucent (3-4 min).
Add liver and saute until browned on all sides. When you cut a piece it should still be slightly pink in the middle. (Don't overcook - that's what causes it to get tough.)
Add garlic while liver is cooking. (It only needs 2-3 minutes to cook.)
Allow the mixture to cool slightly. Put it in a food processor and add wine, lemon juice, salt and pepper. Process to a smooth paste. Add more salt & pepper to taste. Chill and serve with crackers or french bread.
It's very rich, but pate freezes well, so save some for later!
Recipe by CedarValleySustainable at http://cedarvalleysustainable.com/blog/2014/01/21/beef-liver-pate/