Yum. Sauté, as others have said, in plenty of good olive oil with some
garlic -- a standard side dish in Italy. (Bigger or older leaves should be blanched first.) Or stir steamed leaves into creamy polenta with lots of cheese for a tasty cold-weather dinner. I always add the beet tops to my borscht (à la "Laurel's Kitchen," the only recipe I return to in that book).