1
Make the Parmesan panko topping first, then set aside. Cook the bacon next, then set aside.
2
Cook the brussels sprouts, followed by the red onion, garlic, and thyme. Pour in the heavy cream and simmer. Season with salt and black pepper, then stir in the bacon.
3
Sprinkle with shredded Gruyere and mozzarella cheese, followed by the panko parmesan topping.
4
Bake, then broil and let it sit. Season with salt and pepper, then serve.