Grape, orange and ginger gratin

Ingredients

1 knob	Butter
3 cups	Grapes, approximately, depending upon size of baking dish (Main)
1 cup	Mascarpone
½ cup	Greek yoghurt, check there are no added ingredients if you are gluten intolerant
2 tsp	Orange zest, finely grated zest
1 tsp	Fresh ginger, finely chopped
¾ cup	Brown sugar

Directions

1. Grease a shallow baking dish and arrange the grapes to fit tightly. Preheat the grill.
2. Mix the mascarpone, yoghurt, zest and ginger and spoon over the grapes.
3. Scatter the sugar over the top and grill, while watching, until the sugar caramelises.