Cream fat, 110 g diabetic sweetener and Citro-Back with the whisk of the hand mixer. Stir in the eggs one by one. Mix flour, up to 1 teaspoon, starch, spices and baking powder. Stir into the egg-fat mixture. Pour 1/3 of the dough into a greased, breadcrumbed, ring cake tin (approx. 2 litres capacity).
Dust the plums with 1 teaspoon of flour. Fold into the rest of the dough and spread into the mould. Bake in a hot oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 50-60 minutes. Leave to cool in the tin for about 15 minutes, then turn out. Wash the lemon and rub dry. Peel the peel into strips with a julienne sharpener. Squeeze juice from 1 half. Mix 70 g diabetic sweetener and 1-2 tablespoons lemon juice. Spread the icing over the cake.
Peel the peel into strips with a julienne sharpener. Squeeze juice from 1 half. Mix 70 g diabetic sweetener and 1-2 tablespoons lemon juice. Spread the icing over the cake. Sprinkle lemon strips over the cake. Let it cool down