This French Onion Marsala Soup is a delicious and hearty dish perfect for a cozy night in. The soup combines the classic flavors of French onion soup with the richness of Marsala wine, resulting in a unique and indulgent taste experience. The onions are slowly cooked until they are sweet and caramelized, adding depth of flavor to the broth. The addition of Swiss and provolone cheeses melted on top adds a creamy and decadent touch. This soup is perfect for entertaining, as it can be easily prepared ahead of time and popped under the broiler just before serving to create a bubbly, golden crust. Serve it with a side of crusty bread to soak up every last drop of the delicious broth. This French Onion Marsala Soup is a must-try for anyone looking for a comforting and flavorful dish to warm them up on a chilly day.