We were sent to Tart to Tart in search of the best Linzer torte our friend had ever tasted, but on the day we were there, the in-house baker hadn't felt like making a Linzer torte. He had, however, felt like baking Key lime tart, mocha rum tart, chocolate pecan tart, raspberry lemon tart, and about six lush variations on a classic almond-paste base: among them pear, apple, toasted almond, and blueberry. A whole tart, at $19.75, would make an impressive dinner-party dessert, but we prefer to select an assortment, at $2.75 a good-sized slice. (If you feel like Linzer torte, call a couple of days ahead, and they'll make sure it's there for you.)