Heat oil and butter in 10" Dutch oven. Add sliced beef liver and saute quickly, turning to
brown both sides. Sprinkle with salt and remove to a hot platter and keep warm.
Pour off the excess fat from Dutch oven and add chopped onion, celery and garlic.
Cook until tender. Stir in red wine. Reduce heat and simmer until thickened. Add liver
back to Dutch oven and heat through.