In a large skillet melt butter until foamy. Add onions and sauté for a few minutes until golden and soft. Add mushrooms and stir until well coated. Brown for 5-6 minutes.
Pour in ravioli, tossing to mix everything together.
Add beef stock, mix well. Cover and let cook for 5-8 minutes, or until ravioli are cooked, stirring half way through.
Pour in cream, mix until well blended. Remove from heat.
Stir in sour cream and season with salt and pepper to taste.
Garnish with fresh chopped parsley.
Keyword Beef, Dinners, Easy, Easy Dinners, Mushrooms, One Pot Meals, Pasta, Sauces, Simmered