1 unwaxed lemon, finely grated zest only
500g/1lb 2oz strawberries, hulled (leaving 3 whole)
1 level tsp baking powder
225g/8oz caster sugar
225g/8oz self-raising flour
225g/8oz butter or baking spread, softened and chopped, plus extra for greasing
450ml/16fl oz double cream, whipped
4 large free-range eggs