1. On a medium low flame melt butter until it foams and the foam subsides
2. Add onions and cook until well caramelized (this takes a while and the slower you go the better the results)
3. When onions are caramelized at minced garlic and thyme and cook until fragrant
4. Deglaze with your choice of alcohol. Burn off all alcohol and add stock and bay leaves
5. Bring soup to a simmer. Simmer for 30 minutes.
6. While soup is simmering brush Bread rounds with olive oil
7. Toast in a 275 degree oven until crisp
8. Mix the cheeses and top each crisp with cheese.
9. Broil the croutons with the cheese until cheese browns slightly on top.
10. Season soup with salt and pepper to taste and serve with as many croutons as you desire on top