This paper examines specific problems of educational practice that I, an undergraduate engineering educator and education researcher, have encountered in creating an interdisciplinary engineering project course. I reveal my process of theorising about problems of practice to position engineering educators' pedagogical theorising as worthy of scholarly focus. In a reflective scholarship of teaching and learning paradigm, I take the iterative design of this course as the object of inquiry, across semesters and institutional contexts. I discuss the iteration of five key dimensions of the course: (1) authenticity to engineering professional work, (2) promoting learning of teamwork skills, (3) complexities and equity dimensions of situated project-based learning environments, (4) valuing social sciences and social context reasoning for engineers, and (5) creating a responsive curriculum for students. I distil insights related to each of these dimensions. I conclude with a consideration of the interplay between these dimensions and a reflection on the form of scholarship for engineering education.