The non-alcoholic beer that Frank Trosset, the head brewer and founder at Aslan Brewing Co. (Bellingham, Washington), makes regularly for his father started off as a mistake. On a brew day a few years back, he had an overflow from his hot liquor tank, and in an attempt to save the water, he transferred it to his mash tun for overnight storage, figuring he’d just heat it the next day. His flow meter wasn’t accurate, so when he mashed in for his brown ale, he realized way too late that there was too much water in the mash tun.