Creating the French Onion Chicken Bake is simple when you follow these steps:

1. Preheat the Oven: Preheat your oven to 375°F (190°C).
2. Sauté Onions: In a large skillet, heat olive oil over medium heat. Add the sliced onions and cook until they are caramelized, about 15-20 minutes, stirring frequently.
3. Add Garlic and Herbs: Once the onions are golden brown, add minced garlic, thyme, and rosemary. Cook for an additional 2-3 minutes until fragrant.
4. Season Chicken: While the onions are cooking, season the chicken thighs with salt and pepper on both sides.
5. Sear Chicken: In the same skillet, remove the onions and set aside. Add the chicken thighs and sear them for 3-4 minutes on each side until they are golden brown. Remove the chicken from the skillet.
6. Prepare the Broth: Pour the beef broth into the skillet, scraping up any browned bits from the bottom. Bring it to a simmer.
7. Combine Ingredients: Return the caramelized onions and chicken thighs to the skillet, ensuring everything is well combined.
8. Add Cheese: Sprinkle the shredded Swiss cheese over the top of the chicken and onions.
9. Bake: Transfer the skillet to the preheated oven and bake for 25-30 minutes, or until the chicken is cooked through and the cheese is bubbly and golden.
10. Rest and Garnish: Once done, remove the skillet from the oven and let it rest for about 10 minutes. Garnish with fresh parsley before serving.

These steps will guide you in making this incredible dish effortlessly!