In 2010 Seppe started a new chapter in his professional life by launching Graanmarkt 13, together with business partners Tim Van Geloven and Ilse Cornelissens. The restaurant is situated on the lower floor of a lofty townhouse that contains three stories – shop, gallery and restaurant. In 2015, Graanmarkt 13 was awarded Best Flemish Vegetable Restaurant in the green Gault&Milau under the leadership of Frank Fol. In 2018, Graanmarkt 13 is the highest-ranking restaurant in the Benelux, this list of Best Vegetables Restaurants World© was published in the We’re Smart® Green Guide. Seppe’s honest and healthy kitchen serves food that is both light and nourishing, raw and rich, herbal and enjoyable. For lunch or dinner, Graanmarkt 13 offers small appetizers or three and four-course menus in a relaxed atmosphere.