In a large skillet with a lid, melt butter over medium high heat. Add Brussels sprouts and water, cover and steam for 5 minutes.
Remove steamed Brussels spout from skillet using a slotted spoon into a baking dish, set aside.
Add cream cheese into the skillet (don't need to wash it) and melt over medium heat. Add heavy cream and asiago cheese, whisk until smooth over medium heat.
Pour asiago alfredo sauce overtop of the Brussels sprouts. Sprinkle more cheese on top.
Bake at 350 until heated through and the top is brown, roughly 10 minutes.