Lionel Poilâne was a star, a famous Parisian baker who died tragically in a helicopter accident. His genius, moist and malty bread, lives on through his shops now managed by his daughter.
Reserve a few prawns for garnish. In a food-processor, whizz the rest of the prawns with the butter and some pepper. Chill in the fridge so the butter hardens again. Serve it with the toasted Poilâne.