Pit and slice the plums. Put them in a pan with the apple juice, a strip of orange zest and the cinnamon or mixed spice. Simmer gently over a low-medium heat for 10 minutes until tender.

Meanwhile, finely grate 1 tsp of zest from the orange and set aside. Peel the orange with a sharp, serrated knife, removing all the pith, then cut the flesh into segments and set them aside. Put the grated zest into another small pan with the low fat spread and heat gently until melted. Remove from the heat, stir in the muesli and set aside.

Remove the strip of zest from the pan containing the plums. Stir the orange segments into the plum mixture, then divide the fruit between 4 ramekins or heatproof dishes.

Preheat the grill. Spoon the muesli mixture on top of the fruit and sprinkle each portion with ¹⁄₂ tsp demerara sugar. Grill for 3 minutes.