Slice the onions into rings and saute in butter in a skillet until tender.
Turn crock pot on to low and put in water, bouillon cubes, bay leaves, garlic powder, worchestershire sauce.
Add the cooked onion and butter mixture to the crock pot.
Cover and cook for at least5 hours on low.
At this point you may want to taste the soup and see if you would like it a little weaker - if so add a little water. Also at this time remove the bay leaves and discard them.
When ready to serve, slice the French Baguette into thin slices and toast in a toaster oven at 350 until just crusty.
Put toasted slices (1-3) in each bowl and cover with the cheese (adjust the to your liking). Then cover the bread and cheese with the hot soup. The cheese will melt and the bread will rise to the top,.