Trim brussel sprouts of limp leaves, then cut an "x" in the base of each stalk.
Bring a large pan of water to a boil, add sprouts and back back to a boil.
Boil 1 minute, then drain and run cold water over until cool.
Cut sprouts in half.
In separate skillet, saute Bacon 3 minutes.
Add garlic and saute til Bacon is crisp.
Add sprouts and saute til warmed through.
Pour in beer and bring to a boil.
Simmer till sprouts are crisp-tender, about 3 minutes.
Season with salt and pepper.
Place in gratin dish and reheat, covered at 350f for 10 minutes or till hot.
Or leave in skillet and reheat in it.