We cut down about 1/3 of our sage bush in the northern germany garden because it was beginning to overgrow nearly everything else in the spot.
Instead of throwing it away, we decided to dry it for later and I was the lucky one that had to pluck the leaves off the stems. I felt like my grandma, sitting on her porch when I was a child, cleaning several kilos of green beans for canning 🙂 . Anyway, your fingers smell utterly divine after that job!
We then simply dried the leaves in the oven, laid out evenly on 3 trays: Hot air, at 50°C for about 6 hours. With a wooden spoon stuck in the oven door to keep a small slit open to let the air escape.