This chapter shows how public procurement is key to improving cities' capacity to re-localize their food system. The chapter analyses the case of school food procurement in Avignon (France), focusing on actions to improve the quality of the food served by increasing the use of local fresh fruits and vegetables in the preparation of school meals. Comprehensive analysis was combined with participative workshops. The research found that the main constraint to public procurement of local fresh food is not the quantity of local production, but the structure of its distribution and retailing network, especially strategic alliances across scales. In this sense, public demand can boost the development of medium-scale food supply chains operating at territorial scales.