On the outskirts of Vienna, farmer Andreas Gugumuck tosses some extra cereal to thousands of snails inching over planks and lush greenery. Far from being pests, the slow-moving molluscs have become his main produce. “It started as a joke,” said 48-year-old Gugumuck, a former computer scientist who now raises more than 300,000 snails annually in an effort to resurrect a lost culinary tradition of the Habsburg empire. Twelve years ago, an article featuring a renowned Vienna chef serving snails piqued his interest. After some research and poring over old cookbooks, he “found out that Vienna was a…