INGREDIENTS
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1/3 cup quick-cooking barley
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3 tablespoons extra-virgin olive oil
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1 small onion, chopped
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1 small stalk celery, chopped
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Kosher salt
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2 cloves garlic, chopped
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5 tablespoons barbecue sauce
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1 medium carrot, finely grated
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1 cup canned pinto or black beans, drained and rinsed
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1/3 cup breadcrumbs
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1/3 cup walnuts, chopped
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2 teaspoons soy sauce
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2 large egg whites
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2 tablespoons chopped fresh parsley
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6 soft buns, split
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Onion rings, for topping