Preheat oven to 180oC and line one large oven tray with baking paper.
Combine oil, milk and salt in a small saucepan over medium heat and bring to a simmer.
Sift flour into a stand mixer and gradually beat in hot milk mixture and Parmesan until combined. Add eggs, one at a time, and beat until well combined and a dough forms.
Roll dough into 12 balls and place on prepared trays. Bake for 25 minutes or until puffed and golden on top.