The study aims to better understand which challenges and possibilities there are for increasing more sustainable and healthy food (i.e. food sovereignty) within the school food sector in different geographical places in Sweden, and how schools and other relevant actors can lead the way towards more sustainable food systems. This has been examined through a case study of the EU-funded SchoolFood4Change (SF4C) project, with a special focus on the two participating municipalities in Sweden: Umeå kommun and Malmö Stad. The method chosen is qualitative semi-structured interviews, which have been conducted with several key actors connected to the school food sector and the SF4C project. It includes procurers, project managers, food producers, and school chefs. The result showed that there are both possibilities and challenges when it comes to developing more sustainable food systems. Possibilities include, for example, a chance for new forms of collaboration between sectors, and an opportunity for everyone involved to gain more knowledge and understanding of the food we eat. Challenges on the other hand include time limitations, lack of communication, and economic problems for organic small-scale farmers. Further, there are differences between Umeå and Malmö that affect their ability to create sustainable school food systems. For example, they are located in different hardiness zones, and the structure of the project groups differs. Lastly, each actor plays a significant role in creating sustainable food systems.