Broccoli & Cauliflower Casserole

Preheat oven to 375°F. Coat a 2-quart baking dish with cooking spray; set aside.

Add 1 inch of water to a large stockpot fitted with a steamer basket; cover and bring to boil. Add cauliflower florets first, then top with broccoli florets; steam, covered, until slightly tender, about 6 minutes. Remove the vegetables from the pot; set aside. Discard the water and clean the pot.

Heat 2 tablespoons butter in the pot over medium heat. Add flour and cook, stirring constantly, until nutty, about 1 minute. Gradually stir in milk, whisking constantly, until simmering. Whisk in cream cheese, garlic powder, onion powder, pepper and salt. Cook, whisking constantly, until thickened and smooth, about 2 minutes. Reduce heat to low and gradually add Cheddar, whisking until melted after each addition. Remove from heat. Add the broccoli and cauliflower to the sauce and stir to coat. Transfer to the prepared baking dish.

Microwave the remaining 2 tablespoons butter in a medium microwaveable bowl on High until melted, about 25 seconds. Stir in panko and Parmesan until fully coated; sprinkle evenly over the casserole. Bake until golden brown and bubbly, 25 to 30 minutes. Let stand for 5 minutes before serving.