As a vegetarian, lentils are one of my main sources of protein. I love eating them in many different forms but my favorite way to incorporate lentils into my daily meals is in soups. Besides the high levels of protein found in lentils, there are a ton of other reasons why you should incorporate them into your diet. Especially if you are looking to cut back on meat. They’re full of fiber, iron, and polyphenols compounds (which help fight against harmful agents such as heart disease and cancer).