Soak the raisins in lukewarm water. Wash spinach and wilt it using only the water that clings to the leaves and a little salt. Squeeze it perfectly and then thinly mince.
Brown the garlic with butter in a frying pan. Discard the garlic, mix the spinach, the soaked raisins and the pine nuts together and toss for 4/5 minutes.
Serve with freshly ground pepper.