In blender container combine mayonnaise or salad dressing, onion, salad oil, catsup, ... container; stir in blue cheese. Cover and chill. Makes 2 1/2 cups.
Mix together 1 cup salad oil, 3 tablespoons red wine ... (4 oz.) crumbled blue cheese. Chill, covered, for at ... 1 3/4 cups dressing; allow 1 tablespoon dressing for each cup of salad greens.