Most local breweries produce beer in 10-, 20- or 30-barrel batches. And if you’re one of the big boys, single batches can be hundreds of barrels in size. But then there are the smallest operations, the “nanobreweries”, some of which brew beer a single barrel at a time. The latest FOX 5 Morning News beer segment presents the beers and backstories of four such small but mighty operations: Escondido’s Backyard Brewery, Ocean Beach’s Itza Brewing, Grantville’s One Season Brewing and National City’s small-batch beer and ice-cream op, Hannegan’s House Beer Co. and Creamery. Learn all about them then seek them out to see what they have brewing on the smallest scale possible.