A phenomenon early in the pandemic was captured on social media: people stuck at home were baking — and proudly displaying — photos of their bread. “We’ve baked bread for thousands of years. It’s one of the oldest staple foods we have,” baker Zach Martinucci said. So, there’s bread as sustenance. And Martinucci said that going through the steps of making bread might have helped restore a sense of rhythm to days that grew monotonous for people at home with few diversions. Martinucci talks about cooking during the pandemic with two hats on: He owns the bakery Rebel Bread and studied culinary anthropology at the University of California, Los Angeles. His new venture, Bread Club, is intended to help local bakers keep their kitchens humming as consumers and businesses continue to adjust to a shifting marketplace. Five Denver bakeries are members of the club, a market for local artisan bakery orders.