Place kernels and water in a slow cooker. Cover and cook on LOW overnight or until kernels are tender; drain. {Learn more about Wheat Berries}
For the salad
In serving bowl, stir together drained wheat kernels, sugar, cinnamon, mayonnaise, yogurt, vanilla and celery.
Cover; chill until ready to serve.
To serve
Just before serving, stir in apples, grapes and walnuts.
Nutrition information per ½-cup serving: 81 calories, 3 g fat, 1 mg cholesterol, 40 mg sodium, 12 g carbohydrates, 2 g fiber, 2 g protein, 8 mcg folate.