I use a home made broth which I keep frozen in 1 cup packages so I start by thawing and heating the broth in a large pot. Add red hot sauce, wine, worcestershire and pepper to broth. Melt the butter in a large frying pan and saute the onions until soft and just starting to brown. Add onions to broth. Without cleaning the pan add the mushrooms and saute until cooked and browned, add to broth. * If needed a little olive oil can be added to the pan to saute the mushrooms. Bring the broth to a boil, reduce heat and simmer for about 20 minutes. Scoop the soup into onion soup dishes, top with a slice of bread and cheese. Place under broiler until cheese is bubbly and brown. Serve immediately.