I'd make a gallon batch of 12-ish plato beer with it. It should ferment out in a few days. Taste the beer - if it tastes normal, pitch the yeast into a full-sized batch. If not, throw it out, and you'll have only lost 1-gal worth of malt and hops.
The Fiesty(sic) Goat Brewery est. 2007 & Clusterfuggle Experimental Ales est. 2009
Primary: Saison, Berliner Weisse, sLambic I, sLambic II, IPA, 70/-
Secondary: Orange Blossom Mead, Flanders Red I
Kegged: Fat Man Porter w/ 1469, Fat Man Porter w/ 005, Centennial Falcon w/ Conan, Centennial Falcon w/ Denny's, Barrel-aged Fat Man Porter, Belgian Dark Strong, Dark Mild