COLLEEN WESTCOTT has dined all over the world, but she always comes home to Portsmouth — and on occasion, to Gilley’s iconic hot dog cart. “It’s been here 100 years, and it’s won Best Hot Dog contests, it’s been featured on travel shows,” the co-founder of the Portsmouth Eats tours said. “Their steak-and-cheese subs are amazing, and their poutine?” Westcott rolled her eyes at the mention of the diner’s take on the French-Canadian staple. “That very well may be the last meal I ever eat.”

Westcott and her son, Jonathan Carrigan, started Portsmouth Eats when he was 14 and looking

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