How much rosemary for one juniper berry?

The flavor profiles of rosemary and juniper berries are quite different, making it difficult to provide a direct substitution ratio. However, if you're looking to complement the flavor of one juniper berry, a small pinch of finely chopped rosemary should suffice. It's best to start with a little and adjust according to your taste, as rosemary can be quite potent. Always remember that the goal is to enhance rather than overpower the dish.