1 pack of your favourite blue cheese such as Cambonzola
1 or 2 oranges
1 grapefruit

Half fill four ramekin dishes with sliced blue cheese and place in warm oven or under grill until melted
Peel the fruit and pare the flesh carefully from each segment
Arrange the orange and grapefruit pieces alternately on the plate for dipping into the melted cheese

The cheese doesn't have to be blue; you can use brie or camembert or any meltable cheese.