How Quick-Serve restaurants are scaling the food chain.

Lisa Mason stood outside a Chicago restaurant at 9:15 a.m. on a recent sunny Monday, where she would continue to wait for two hours. She wasn't there for breakfast. She was there to get a $1 burrito. Mason was the first person in line at the new Chicago outpost of Dos Toros, a New York-based fast-casual taqueria opening its second location in the Windy City. By the time the doors opened at 11:30 a.m., more than 200 people stood on the sidewalk in a line that stretched across the West Jackson Boulevard bridge over the Chicago River.
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