Pour The Water Into The Bottom Of A Large Pot Over Medium Heat. Add The Onion, Garlic, Red Pepper, And Salt To The Water And Bring To A Boil. Stir In The Champagne And Return The Mixture To A Boil. Place The Lobsters In A Steamer Basket And Lower Into The Pot. Steam The Lobsters Until They Turn A Bright Red Color, About 12 Minutes.