Substance Diner

Substance Diner is a mobile food truck located in Tucson, Arizona, specializing in plant-based diner-style comfort food operated by owner Karl Poechlaur. The business features an extensive vegan and vegetarian menu with items like plant-based burgers, sandwiches, and Sonoran hot dogs made from scratch, alongside coffee and desserts. Operating from locations including 103 N Park Ave and 3445 E Benson Hwy, Substance Diner has become a standout in Tucson’s local dining scene for its innovative vegan cuisine and commitment to made-to-order freshness.