INGREDIENTS
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4 medium portobello mushroom caps (about 1 lb.), gills removed, chopped
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1/2 c. walnuts
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1 clove garlic
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2 tbsp. canola oil
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1/4 c. Chopped red onion
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3 green onions, chopped
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2 tsp. rice wine vinegar
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1 c. cooked quinoa
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1/2 c. cornstarch
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Whole-grain burger buns
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sprouts
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Lettuce
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Sliced tomatoes
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1/2 c. mayonnaise
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1 tsp. finely chopped fresh rosemary
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1 tsp. lemon juice
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Kosher salt