It will take a while to caramelize the onions for the base of this soup, but the result is a deeply flavored dish that will warm your soul.
Beef broth is also an essential part of the recipe. If you’re using store-bought broth, as I do here, please taste it before using it to see if you like it. If you want to enhance the flavor, simmer it with the ends and peels of the onions for about 20 minutes, and then strain it.
