Most underrated vegetable: Celtuce
"Celtuce is a vegetable related to lettuce or celery that is often sliced and used in stir fries in Asian countries. It has a very mild flavor which can be enhanced by whatever it is being cooked with, which makes it easy to add to anything, especially sautéed greens or soups."
MARC MEYER - CHEF, COOKSHOP, FIVE POINTS (NEW YORK, NY)
Most overrated vegetable: Red and green bell peppers
"They are used indiscriminately to add color to a dish, but the flavor can be one-dimensional and harsh, and they don't blend well; they are much better cooked."
Most underrated vegetable: Broccoli
"It's viewed as something to be served with onion dip, but people forget how versatile it can be, served with chickpeas, charred and stewed in olive oil, slowly cooked and served with chile as a pasta. Everyone wants to use broccoli rabe or kale."