In very large skillet or dutch oven film bottom with olive oil, add mushrooms, shallots and garlic, cover and cook on medium until, ushrooms give off their liquid, uncover and cook a few minutes until light golden. Add brandy off heat, return to heat and carefully reduce until almost all gone. Add beef broth, Worcestershire sauce, pepper and hot sauce, bring to a boil, add cooked meatballs, cover lower heat to low and simmer 10 minutes, add sour cream, mix well, add parsley, simmer on low 5 minutes. At this point if you want the sauce thicker add pea size bits of butter/flour mixture adding only enough to get to desired thickness.
