Nothing like a little fraternal competition to wind down the weekend – rival chefs Bob and David Kinkead match wits again, this time via the quintessential grillable summer sandwich: the burger. On Sunday evenings through Labor Day guests can order the Dueling Burger and enjoy a side by side tasting of the two versions for just $16. One comes with Boursin, pancetta, ripe tomato and radish sprouts while the other has Anaheim chilies, Jack cheese and chipotle lime mayo. Whether you’ve come home from a weekend away to an empty fridge or just don’t feel like firing up the grill, the Kinkeads are happy to do the cooking for you, especially if they can make a contest out of it. Call Sibling Rivalry at 617.338.5338 for reservations.