Here an easy recipe developed by my son Adam with rich aromatic her flavors. The onions are sweet and caramelized to make a really delicious broth. This dish also has an interesting food history.
Place onions and shallots in a medium sized bowl. Sprinkle with flour, pepper and salt.
Turn off heat. Add cognac, Worcestershire and nutmeg. Stir and allow to sit for about 10 minutes. Add salt to taste.
Place under the broiler until the cheese begins to sizzle and turn brown. Enjoy!