1 pound boneless sirloin steak  | 
                                                cooking spray  | 
                                                1 1/2 cups chopped red onion  | 
                                                1 (8-ounce) package pre-sliced mushrooms  | 
                                                2 tablespoons all-purpose flour  | 
                                                1/2 teaspoon salt  | 
                                                1/4 teaspoon paprika  | 
                                                1/4 teaspoon pepper  | 
                                                2 teaspoons vegetable oil  | 
                                                3/4 cup beef broth  | 
                                                3/4 cup fat-free sour cream  | 
                                                1/4 cup chopped fresh parsley  | 
                                                2 cups hot cooked medium egg noodles (about 3 ounces uncooked pasta)  |