Lentil soup or mercimek corba in Turkish is a very common soup in the Mediterranean. I grew up on the brown lentil soup, but when I got married I was introduced to the orange lentils. I learned how to make orange lentil soup from my husbands Aunt, I picked up the addition of adding spinach from my dear friend Hatice! She adds butter to her soup at the end of cooking, which does make it taste so good, but if you want to save on calories then just make as is in the recipe.
I have another lentil soup recipe on here as well under the soup category, both are very delicious soups.