To soften Brussels sprouts, steam for 15-17 minutes.
In a large bowl, mix Brussels sprouts with soup until completely coated.
Fold in Parmesan and cheddar cheese.
Transfer Brussels sprouts to greased 1.5 quart casserole dish.
Season with salt and pepper, to taste.
For the Topping
In a medium-sized bowl mix cornflakes, butter and parmesan cheese.
Sprinkle topping over Brussels sprouts mixture.
Place casserole in oven for 40-45 minutes, until bubbly and topping is lightly browned.
Notes
Preparation of Brussels Sprouts: To ensure that the Brussels sprouts are tender and flavorful, consider roasting them instead of steaming them. Roasting can enhance the natural sweetness of the Brussels sprouts and add a caramelized flavor to the dish. Simply toss the halved Brussels sprouts with a little olive oil, salt, and pepper, then roast them in a preheated oven at 400º Fahrenheit for about 20–25 minutes, or until they are tender and lightly browned.
Customize the Topping: While the cornflake topping adds a nice crunch to the casserole, feel free to experiment with other toppings for added flavor and texture. You can try topping the casserole with a mixture of breadcrumbs, chopped nuts like almonds or pecans, or even crispy fried onions. Don't hesitate to get creative and tailor the topping to your preferences.
Adding Herbs and Spices: Enhance the flavor profile of the casserole by incorporating herbs and spices into the dish. Consider adding a pinch of garlic powder, onion powder, or dried thyme to the Brussels sprouts mixture for added depth of flavor. Fresh herbs, like chopped parsley or chives, can also be sprinkled over the casserole just before serving for a burst of freshness and color. Experiment with different herbs and spices to customize the dish to your taste preferences.