Bring 2 gallons of water to boil. Add dextrose, malt extract and garlic. Boil about 16 minutes or so. Remove from heat. You can either make super-garlic beer or regular-garlic beer. For regular garlic beer, strain out garlic. Add wort to fermenter with enough water to make 5 gallons. Pitch yeast. If making super garlic beer, rack to secondary after a few days, straining out garlic when racking.