Preheat a cast iron pan over med-high heat. Once hot, add in olive oil and chicken. Sprinkle with chili flakes and season with salt and pepper to your taste. Cook until browned, about 5-6 minutes, then set aside.
In the same preheated pan, add one more Tbsp of olive oil, then stir in onion, mushrooms, garlic and Italian seasoning. Cook for about 5 minutes, until the onion and mushrooms begin to soften.
Pour in chicken broth, double cream and return the chicken to the pan.
Distribute the lasagna sheets evenly across the skillet, and add in mozzarella and parmesan. Make sure you place both of them evenly across the top.
Cover the skillet with a lid and allow the mixture to simmer for 20 minutes, stirring occasionally, until the lasagna is cooked. You should check halftime, and give it a small stir, so it doesn't stick to the bottom.
Garnish with fresh chopped parsley and let it cool for 5 minutes before serving.