Instructions

  1. In a large Dutch oven, melt butter with olive oil over medium low heat.
  2. Add onions and thyme.
  3. Toss to coat.
  4. Slowly cook onions, tossing occasionally until some of the onions start to brown.
  5. Add sherry, beef broth, salt and pepper.
  6. Bring to a boil.
  7. Reduce heat and simmer for about 40 minutes.
  8. Top French bread with Mozzarella cheese slices; place in broiler.
  9. Broil until cheese is well melted.
  10. To serve ladle into bowl and top with a bread slice.