4. British invasion
United Kingdom-based quick-service chain Leon has begun its U.S. approach, opening one unit in Washington, D.C., last fall and recently announcing plans for a second location opening this spring. The eco-focused concept, with 60 European units, powers its stores with sustainable energy and uses compostable packaging. Leon, which bills itself as serving “naturally fast food,” has a Mediterranean-focused menu and was founded in 2004 by former Procter & Gamble exec John Vincent.