Preheat oven to 375°F (190°C) and lightly grease the baking dish.
Heat olive oil in a pan over medium heat.
Cook sliced chicken for 3 to 4 minutes until lightly golden, seasoning with salt, pepper, paprika, and Italian seasoning.
Add chopped onion, sliced mushrooms, zucchini, and minced garlic to the pan and cook for 4 minutes until vegetables are slightly tender.
Stir in heavy cream and chicken broth, simmer for 2 minutes.
Mix in grated Parmesan cheese.
Transfer mixture to the prepared baking dish and top evenly with shredded mozzarella.
Bake for 20 to 25 minutes until the dish is bubbly and golden.
Let bake rest for 5 minutes before serving with rice, pasta, or garlic bread.