Let’s embark on this culinary journey together, one that promises to fill your home with warmth and your plate with delight.

1. Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish lightly with olive oil and set aside.
2. In a large skillet, heat olive oil over medium heat. Add the sliced onions and sauté until they are golden and caramelized, about 15 minutes. Stir occasionally to prevent burning.
3. Once the onions are caramelized, add the ground beef to the skillet. Cook until browned and cooked through, breaking it apart with a spatula as it cooks.
4. Sprinkle in the dried thyme, salt, and pepper. Stir well to combine, letting the flavors meld together for an additional 2 minutes.
5. In a large mixing bowl, combine the cooked rice, beef mixture, condensed French onion soup, and beef broth. Stir until well mixed.
6. Transfer the mixture into the prepared baking dish, spreading it evenly.
7. Sprinkle the shredded Swiss cheese evenly over the top.
8. Bake in the preheated oven for 25-30 minutes, or until the cheese is melted and bubbly, with a golden crust.
9. Remove from the oven and let it rest for a few minutes before serving. Garnish with fresh parsley if desired.