Bon AppétitSpinach and Leek Gratin with Roquefort Crumb ToppingOctober 1, 20054.4(34)Spinach and Leek Gratin with Roquefort Crumb ToppingLeo GongArrowJump To RecipeSave StorySave this storyPrintRecipe notesBack to topTriangleSee Related Recipes and Cooking Tips18 Ways to Use Dijon MustardThink dijon is just for sandwiches? Think again.