Grandpa Gabe's French Onion Soup

This is an Octoberfest Tradition. My Dad used to bring it every year,then I started making it.
4 large onions, thinly sliced
2 T butter or margarine, melted
8 c. water
8 tsp. beef bouillon
1 tsp. chicken bouillon
1/4 tsp. black pepper
1/2 clove garlic, minced
2 T soy sauce
1 tsp. MSG
Place sliced onions in a large shallow roasting pan and drizzle evenly with melted butter. Bake at 45o for 20 min, stirring twice, until onions are soft and just beginning to brown.
Place water, bouillon, pepper, garlic, soy sauce, msg, and baked onions in large pot. Bring to a boil, cover and simmer 2 hours. Ladle soup into oven-proof bowls and float a slice of toasted bread in each one. Top bread with sliced cheese and place under broiler until cheese is melted and begins to bubble.