Cherry tomato, watercress and mozzarella puff pastry tart Serves: 4 Ingredients 1 sheet ready-rolled puff pastry 1 egg, beaten knob butter 120ml crème fraiche 85g watercress 100g mozzarella 6 yellow cherry tomatoes 6 red cherry tomatoes flat-leaf parsley to garnish Instructions Heat oven to 220C/Gas 7. Lay pastry on a baking sheet, score around the