The chain will start selling gluten free chicken nuggets, grilled wraps and other meals from a new branch in West Yorkshire. It will offer space for 50 diners to eat-in but also have a drive-thru option.
The restaurant at A650 Wakefield Road, close to the M62 and M621 junctions, is due to open in the Autumn.
Leon said more sites are planned for this year.
The launch comes around two months after Leon was bought by EG Group, the convenience and fuel retailer owned by the billionaire Issa brothers, Zuber and Mohsin, and private equity firm TDR Capital.
The new owners also last year revealed a planned £6.8 billion takeover of Asda.
The Issa brothers, the co-CEOs of EG Group, said: “This is the first of many new, strategic openings for the Leon brand under EG ownership. Opening a Leon drive-thru concept is a landmark moment for the brand, creating a fantastic opportunity to bring Leon’s naturally fast food to even more people.”
The new restaurant will be supplied with power from a 100% renewable energy source. It will have solar panels on the roof which will contribute to further reducing energy consumption.