In a large skillet, heat olive oil over medium. Add onions and cook for about 3 minutes. Add mushrooms and cook until tender and slightly browned, 5 to 8 minutes. Sprinkle mixture with flour and stir to coat.
Add ravioli, beef broth and Worcestershire sauce to skillet. Stir to combine and bring to aboil. Reduce heat, cover and simmer 8 to 10 minutes, until ravioli is cooked.
Add sour cream, salt and pepper and stir to fully combine. Cook on low an additional 5 minutes to heat through. Top with green onions.