Arrange the sliced plums on a pan and drizzle generously with sugar. Broil about 7 inches away from flame. Apportion one plum per person. Broil about 8 minutes or just until the tops begin to brown and slightly char.
Meantime, quickly mix with a small wisk in a small bowl, 2TB of mascarpone with 1/2 TB of honey per person.
Immediately plate the broiled plums and scoop the mascarpone cream mix in center or side. You may add a leaf of mint which I didn't have at last night's dinner.