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Photographer Doug Levy went behind the scenes at one of the recent Stacked Donuts and Trademark Tarts pop-ups, this one at Fairsted Kitchen, to document the preparation of the treats. "It was amazing to see how fast the restaurant went from empty to having a line out the door (at 10 p.m. on a Monday!) once Stephanie and Justin's late-night pop-up treats went live," writes Levy on his blog.