Found this in the magazine Simple & Delicious by Taste of Home submitted by Gina Berry. I love French Onion soup and this one sounded easy and a little different. Would be great for a meal with a side salad.
In a Dutch oven, saute onions in butter until tender. Add the broth, water, soup mix, pepper Worcestershire sauce and garlic powder. Bring to a boil. Reduce heat; cover and simmer for 5 minutes.
Meanwhile, place bread slices on ungreased baking sheet. Sprinkle with Swiss and mozzarella cheeses. Broil 4 inches from the heat for 1-2 minutes or until cheese is melted. Ladle soup into serving bowls, top each with a toast slice. Sprinkle with Parmesan cheese.