BOSTON – With food inflation in the U.S., Chipotle Mexican Grill is doubling its bet on family-sized meals – and drawing a giant bag for all customers who buy the promotion. The action of the fast food network Tex-Mex aims to encourage the purchase of meals that can feed four to six people. According to Chipotle, the meal comes out for less than $10 per person, and is ready for withdrawal in up to 10 minutes.