Silicon Valley-based Impossible Foods has taken a high-tech approach to creating a plant-based burger that smells and tastes like real meat. At the company's headquarters in Redwood City, Calif., chef Traci Des Jardins served the Impossible Burger (pictured uncooked) with vegan mayo, Dijon mustard, mashed avocado, caramelized onions, chopped cornichon, tomato and lettuce on a pretzel bun. (Maggie Carson Jurow)
