Place the Brussels sprouts, water and salt in a medium saucepan and bring to a boil. Boil 10 minutes, or until sprouts are tender but firm.
Over medium low heat in a large saucepan, mix the olive oil, garlic and green onions. Slowly cook and stir 5 minutes, until the green onions are soft. Mix in the Brussels sprouts, grapes and butter. Cover and simmer 20 minutes.
