Lots of yummy for your tummy.TASTEThe Bucktown Apple Pie ContestWhat: Sample desserts made by home and professional chefs, listen to bluegrass, and learn to square dance. Pastry chef Gale Gand leads the pie judging.Why: All proceeds support events and beautification at Holstein Park.When: Sun., 2-5 p.m.Where: 2200 N. Oakley Ave., at Lyndale St. Admission is free.SEEMore Is MoreWhat: An exhibition of Chicago artist Nancy Rosen’s paintings, which flirt with patterns and layers.Why: Party with the dudes from creative consortium The Post Family, who are putting on the show.When: Thru Nov. 12. Opening reception, Fri., 6-11 p.m.Where: The Family Room, 1821 W. Hubbard St., b/t Wood St. & Wolcott Ave. (312-265-6406).BUYTruffle Truffle’s Fall CollectionWhat: Chef/owner Nicole Greene breaks the mold with her artisan, small-batch confections infused with seasonal flavors.Why: Pecan pie truffles, Concord grape caramels, and pumpkin s’mores. Oh, my.When: Thru Nov. 4.Where: Southport Grocery & Cafe, 3552 N. Southport Ave., b/t Addison & Eddy Sts. (773-665-0100).HEARBook Bike Fundraiser ConcertWhat: Help Gabriel Levinson gear up for another year giving out books by bike at a triple-bill live show (Sad Brad Smith, Adam Fitz, and Stephen Paul Smoker).Why: It’s $5 for a smart cause.When: Tonight, 9:30 p.m.Where: The Empty Bottle, 1035 N. Western Ave., at Cortez St. (773-276-3600). Tickets online at ticketweb.com.EATPerennial’s New Brunch MenuWhat: Awaken your inner child with choices like French toast sticks and Apple Jacks pancakes, plus homey faves such as biscuits and gravy.Why: The Brass Monkey cocktail (OJ and Mickey’s) is a flashback and a half.When: Sat. & Sun., 10 a.m.-2 p.m.Where: 1800 N. Lincoln Ave., at Wells St. (312-981-7070).Photo: Gsz / FlickrUp to 55% off Degaine & Reverse by DolanWhen it comes to effortless outfits, jeans and T-shirts top everybody’s list. Snag velvety soft denim by Degaine and sultry tops from Reverse by Dolan while they’re up to 55% off on Swirl.