French Onion Soup

4 Tbsp Butter
4 yellow onions
2 tsp salt
1 tsp sugar
1 tsp white pepper
2 Tbsp flour
2-14 1/2 oz cans of Beef broth
1 1/2 can of water (broth can)
8 1/4" slices of french bread
1/2 lb of swiss or similar cheese
1 tsp vermouth

Melt butter, add onions, salt, sugar,and pepper. Brown for about 40 minutes.
Mix in flour, cook then add the broth and 1 1/2 can of water. Bring to a low boil and simmer uncovered for 10 minutes.
Broil one side of each slice of bread, turn, add a slice of cheese and broil to melt cheese. Put the slice of bread w/cheese into the bottom of a bowl.
As soup is finishing, add vermouth. Taste and adjust seasonings and vermouth as needed. Pour over bread. Bring to the table with grated cheese.