Roughly chop the sweets. Warm the cream in a pot. Melt the candies, except for 1 teaspoon, in the cream while stirring.
Preheat oven (electric cooker: 250°C/circulating air: 225°C/ gas: level 5). Wash the plums, cut them in half and remove the stone. Cut the plums into thin slices and place them on four oven-proof deep plates or bowls.
Pour the cream caramel over it. Cook in the hot oven for 4-5 minutes until the sauce begins to brown. Sprinkle with the rest of the sweets, dust with icing sugar. Serve immediately.