You can adjust the spices to your taste, it is a very forgiving recipe.
You can skip the ghee if you don’t want it, just mix the spices and the dal and boil together.
If you plan to serve this as a clear soup, let the soup stand for a few minutes and then just pour out the liquid. You can use the leftover dal to make some dal parathas or sambar
You can zest up the soup with a dash of lime juice