Watercress, Leek, Cheddar, and Sourdough Gratin is a heartwarming dish that combines the peppery notes of fresh watercress with the sweetness of leeks, enveloped in creamy cheddar and topped with crunchy sourdough. Perfect for chilly evenings, this gratin is both comforting and impressive, making it an excellent choice for family dinners or gatherings with friends. Each bite promises warmth and satisfaction, bringing everyone back for seconds.