Packed with fiber, minerals and a steak's worth of protein, the lentil is one of the oldest and most versatile players in the pantry. Alton Brown makes lentil soup, lentil salad and lentil cookies...yes, cookies.Packed with fiber, minerals and a steak's worth of protein, the lentil is one of the oldest and most versatile players in the pantry. Alton Brown makes lentil soup, lentil salad and lentil cookies...yes, cookies.