Brown The Meat And Mushrooms In Oil. Mix In The Broth And Nutmeg. Simmer 30 Minutes. Beat The Egg Yolks And Cream In A Small Bowl. Slowly Stir Into The Meat Mixture. Mix The Butter And Flour In Small Bowl Until Smooth. Add A Little At A Time, Stirring Constantly. Stir Until Sauce Is Thick. Remove From Heat. Serve Over The Noodles And Garnish With Lemon Wedges.