2 large clementines (about 200g/7oz), cleaned
1 large lemon, zest only
1 large lemon, juice only
2–3 oranges, segmented
2 tsp baking powder (gluten-free if needed)
160g/5¾oz golden caster sugar
15²µ/½´Ç³ú caster sugar
icing or caster sugar, for dusting
175g/6oz ground almonds
100ml/3½fl oz olive oil
250ml/9fl oz whipped cream (optional)
4 large free-range eggs