This hearty sandwich is a filling lunch recipe. Prepare the chicken salad at home the night before, and then assemble the sandwich at work the next day.
Combine first 6 ingredients in a large bowl, stirring with a whisk. Stir in chicken, celery, and walnuts.
Spread 1/2 cup of salad onto each of 10 bread slices. Top each serving with about 2 tablespoons bell pepper, 1 lettuce leaf, and one bread slice.
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