In a medium saucepan, bring the vinegar, brown sugar, celery seed, turmeric, ginger, and allspice to a boil over medium-high heat. Stir in the onion, remove from the heat, and allow to stand for 5 minutes to cool.
Meanwhile, toss the cabbage, cucumber and bell pepper together in a serving bowl.
Whisk the olive oil into the cooled vinegar mixture until combined. Pour the onion-turmeric vinaigrette over the vegetables and toss to coat. Season, to taste, with salt and pepper and serve.
Recipe courtesy of Francine Segan, Movie Menus: Recipes for Perfect Meals with Your Favorite Films, Villard Books, 2004