As Americans eat more food prepared away from home, restaurants, fast-food outlets, and supermarkets are fighting for a share of your stomach

It's 10:30 a.m. on Chicago's North Side, and the food court at a Dominick's Finer Foods supermarket is swarming with teens. On lunch break from school, they pack the store's stylish coffee bar and dig into pizza, burritos, and kung-pao chicken at tables next to the produce aisle. "I go out to eat a lot," says Elsie Soto, an 18-year-old college student, clutching a white carton of stir-fried veggies.

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