It started in Thailand, then moved to Hong Kong. Recently it has come to North America with New York and Las Vegas lining up for this latest trend in frozen desserts. Move over cold stone creameries and self-serve yogurts, stir-fry ice cream is here. Stir-fry ice cream is made by pouring cream onto a teppan grill chilled down to as low as -35°C. Mix-ins are stir-fried on the chilling surface, and when the ice cream…