400g/14oz blueberries, washed and drained
1 unwaxed lemon, juice and zest
陆 tsp bicarbonate of soda
4 tbsp coconut flour
4 tbsp coconut oil or butter
2 tbsp maple syrup
pinch salt
1 tsp vanilla extract
4 free-range eggs, at room temperature
150g/5oz full-fat probiotic yogurt or coconut yogurt