Add 1 tablespoon of kosher salt to a large pot of water and bring it to a boil.
Slice the Brussels sprouts in half, removing any tough ends or browned outer leaves.
Place the Brussels sprouts in the water and boil them 4 to 5 minutes until they are crisp tender and bright green. Taste test as soon as possible and try to avoid over-boiling.
Immediately drain the Brussels sprouts well. Toss with the salt and butter, stirring until the butter melts. Add the Parmesan cheese and black pepper and serve.