This legume is often forgotten when it comes to protein alternatives. There is a myth that lentils shouldn’t be relied on as a source because it isn’t a complete protein. Dried lentils don’t contain all 9 essential amino acids but sprouted lentils do. If you enjoy cooking with dried lentils, add another protein to the dish or just some other source within 24hrs. One cup of boiled lentils contains 18 grams of protein.