The Cape Breton Celebrity Cookbook features a recipe for sweet-and-sour meatballs credited to Ashley MacIsaac (“Fiddler/Stepdancer, Creignish”). It’s hard to imagine the notorious Celtic-music reprobate beating eggs and slicing peppers, but one thing’s for sure: When he picks up his fiddle, he really cooks. During a decade that has seen him straddle the borders between folk and funk—while wearing a kilt (as revealed in a legendary appearance on Late Night With Conan O’Brien) as God made him—MacIsaac has matched his personal controversy (the New Yorker confirmed his affinities for drugs, boys, and lobsters) with consistent, high-energy, precise fusions of his native traditions and his own wild muse. Decca, his latest label, is sending him out with a full band to promote his latest, eponymous CD, which features production by Kevin Killen (U2, Peter Gabriel) and Roger Greenawalt (No Doubt). Ask Ashley about his meatballs when he plays with Cory Branan at 8 p.m. at Iota Club & Cafe, 2832 Wilson Blvd., Arlington. $12. (703) 522-8340. (Pamela Murray Winters)