Preheat oven to 450º. Place sliced plums in a bowl. Mix sugar and vanilla bean in a small dish, and sprinkle mixture over plums, tossing gently to coat.

Place plums on a baking sheet lined with parchment, and bake for about 7-10 minutes, making sure not to overcook. Just long enough to caramelize the sugar.

Enjoy with all manner of creamy goodness, from yogurt to gelato.