Pre-heat the grill to high. Halve the peaches and remove the stone.
Place them cut side up on a baking tray. Sprinkle with sugar and dust lightly with the cinnamon. Place under the grill to glaze.
Mix together the vanilla seeds with the natural Greek yoghurt. Place the hot glazed peaches in the centre of a plate or bowl, and add a dollop of Vanilla yoghurt with a scattering of toasted almonds or hazelnuts.