Chicken Divan

Preheat oven to 400°. In a large skillet over medium heat, heat oil. Add onion and cook until soft, 5 minutes. Add garlic and cook until fragrant, 1 minute more. Add broccoli and cook until fork tender, about 5 minutes.  Add chicken, cream of chicken soup, milk, and cheddar. Season with salt and pepper. Bring to a simmer and cook until warmed through, 5 minutes. Pour into a 9”-x-13” baking dish.  In a medium bowl, combine panko, Parmesan, and melted butter. Sprinkle over casserole in an even layer and bake until mixture is bubbling and top is golden, 30 minutes.  Serve warm over pasta.