Lentils are highly appreciated for their high content of important nutritional elements, first of all, iron: these legumes are part of the family of annual herbs, and their origin is found in none other than the Asian continent - more precisely in the to the south-west of the same - although they then also spread to the Mediterranean, acclimatising and becoming very common. Inside the lentil pods, there are generally about two or three round and flat seeds, characterized by a light color which, depending on the variety, can even tend towards black.