4 Sliced onions
2 thyme sprigs
Butter
6 cups beef broth
Cognac
Salt
Pepper
Gruyere bread

4 Sliced onions 2 thyme sprigs 6 cup s beef broth

Cook 4 sliced onions, 2 thyme sprigs in butter for 20 minutes covered
Uncover, cook until carmelized
Add 6 cups of beef broth
Simmer 10 minutes
Add cognac, salt and pepper
Top with gruyere bread