Shortbread biscuits with caramelised oranges and vanilla yoghurt Archive

Ingredients

• 300g/10½oz plain flour, plus extra for dusting
• 200g/7oz butter
• 100g/3½oz caster sugar
• 1 free-range egg yolk
• 100ml/3½fl oz yoghurt
• ½ lime, juice only
• 1 vanilla pod, seeds only
• 2 oranges, peeled and sliced into thin rounds
• 2 tbsp soft brown sugar
• icing sugar, for dusting
• 1 sprig fresh mint, to garnish