1 lb fresh spinach leaves  | 
                                                1 cup fresh mushrooms, sliced  | 
                                                4 slices cooked and crumbled bacon  | 
                                                1/2 cup mayonnaise  | 
                                                1/2 cup sour cream or 1/2 cup plain yogurt  | 
                                                1 tablespoon white wine vinegar  | 
                                                2 tablespoons lemon juice  | 
                                                1 tablespoon green onion, chopped  | 
                                                1 tablespoon fresh parsley, minced  | 
                                                1 -2 garlic clove, crushed  | 
                                                1/2 teaspoon dijon mustard (optional)  |