Heat clarified butter in a saucepan. Peel and dice the onion and add to it. Sweat a little. Dust with flour and brown a little more. Deglaze with milk + water. Dissolve the granulated broth in it.
Peel off the meat from the roast chicken and cut into small pieces. Add the rice to the soup. Let simmer a little more so that the soup binds. Season to taste with dried marjoram and a little curry.