If you search the word Gnocchi I started a post on this a couple months ago, and people had so good recommendations.
But I recently went to Butterfield 9 and they had an incredible gnocchi preperation with peas, light goat cheese and parmesan. It was amazing!! It just screamed "SPRING TIME!" I highly recommend it.
Also my boyfriend swears that Al Tiramisu on P St in Dupont has the best gnocchi in town. I haven't had it in over 2 years but I know they make it fresh by hand....same with Filomeno in G-town (Ya Pasta Mamas!!!).