This article explores a transdisciplinary, collaborative, curriculum design project to promote institutional belonging as a driver of student engagement, and to equip graduates with the fluency to work across disciplines. It demonstrates a facilitated method, to construct learning outcomes that break with typical subject-based knowledge and associated hierarchies of expertise. After considering a small number of precedents, the authors use curriculum models to inform a design specification. Following the formation of a multidisciplinary design team, a development tool (Lego® Serious Play®) was selected for a design workshop. A qualitative analysis of the workshop transcript was then used to inform the learning outcomes for a common module to be taken by all first-year undergraduates. Finally, the article considers how the process provided a framework for collaborative design that has been implemented in further projects, and led to the creation of a growing community of practice. The project provides insights for others embarking on collaborative curriculum design initiatives, especially where transdisciplinary learning is an objective.