Eton mess cake

INGREDIENTS

• 175g unsalted butter
• 5 tbsp double cream , from a 300ml pot
• 1 tsp vanilla paste or extract
• 225g plain flour
• 100g ground almonds
• 1 tsp baking powder
• 200g golden caster sugar
• 5 large eggs , at room temperature
• 400g strawberries ,½ roughly chopped, ½ finely sliced
• 4 meringues nests (50g/2oz), very roughly broken up
• a little icing sugar , to serve