2 tbsp. butter
1 large red onion, sliced
1 can beef broth
dash of Worcestershire sauce
French bread, toasted
4 tbsp. Swiss cheese, grated

In a medium saucepan, over medium heat, melt butter; cook onion until tender, about 5 minutes, stirring often. Add beef broth, Worcestershire sauce. Cook additional 5 minutes. Divide soup between 2 ovenproof bowls. Top each with toasted French bread and 2 tablespoons grated Swiss cheese.

Bake at 325°F for 5 minutes or until cheese melts.