In a Dutch oven, heat oil and butter over medium-high. Add onions and season with salt and pepper. Cook until tender and caramelized, stirring often, 10 to 15 minutes.
When onions are caramelized, stir in pasta, garlic and thyme. Cook 1 minute, stirring occasionally. Add sherry and cook until absorbed, 2 to 3 minutes. Gradually add beef broth, stirring frequently. Bring to a boil and then reduce heat to medium-high. Season with salt and pepper. Cook until liquid is absorbed and pasta is tender, 12 to 15 minutes.
Remove from heat. Stir in half of Swiss cheese, topping with remaining amount. Garnish with thyme.
Source: Hannaford fresh Magazine, October November 2024