Next to the BCA (Boston Center for the Arts) in the heart of the South End is another artistic endeavor – a culinary one – called Sibling Rivalry. Embracing the performance aspect of cooking, chef David Kinkead has started “Show & Taste Tuesdays.” On the first Tuesday of each month, Kinkead and his crew demonstrate the secrets behind a three-course dinner, after which diners get to eat the fruits of their labor (7 PM; $50 per person; 617-338-5338).