Eat lentils on New Years day, it will bring money! That was the saying in Czech republic when I was young and still is I believe.
We would often have this lentil soup which is simple but tasty. The lentils provide both protein and a satisfying texture even when made without meat. My grandmother often served it with fried onions and a fried ham slice on top and you can add this to your soup for more protein.
The soup is very versatile and over the years I have served it in different restaurants simple as is or with the addition of diced tomatoes, spinach, mushrooms, stew beef and other vegetables, adding just one item or a combination of several.
The addition of vinegar to the soup really helps lift the flavor of the otherwise mild ingredients.
Just like pea soup and bean soup, lentil soup gets better the second and third day as the soup thickens and the flavors marry.
A very tasty and very healthy soup.