Heat a little clarified butter in a large pan. Add onion, sprinkling sugar over them to help them brown. Add garlic and cook for a few minutes. Stir the onions and garlic and place tripe pieces on top. Add tomatoes and 3/4 cup red wine and bring to a boil. Then add mushrooms and smoked beef, sausage, herbs and nutmeg. Season generously with salt and pepper. Reduce heat and simmer for 1 hour.
After 1 hour, add remaining red wine and cook another 2 hours, until tripe is tender. Pour into warmed soup tureen and serve immediately.