Food & Cooking Recipes Breakfast & Brunch Recipes Hot Ham-and-Cheese Croissant Be the first to rate & review! By Martha Stewart Test Kitchen Martha Stewart Test Kitchen The recipes developed by our test kitchen team have undergone a rigorous process of development and testing, ensuring that every element is optimal, from ingredient amounts to method and cooking time. This process includes triple-testing recipes to ensure they meet our high standards. The many stellar cooks and food editors who have been part of our team include Sarah Carey, Lucinda Scala Quinn, Jennifer Aaronson, Shira Bocar, Anna Kovel, Greg Lofts, Riley Wofford, Lauren Tyrell, and Lindsay Leopold. Editorial Guidelines Updated on January 15, 2021 Print Rate It Share Share Tweet Pin Email Photo: Gieves Anderson Prep Time: 10 mins Total Time: 20 mins Servings: 1 Yield: 1 Croissant This crispy, cheesy, meaty croissant showcases Dijonnaise (equal parts mayonnaise and Dijon mustard), one of the test kitchen's favorite condiments. It's also an easy way to enjoy leftover ham. Ingredients 1 croissant 1 teaspoon mayonnaise 1 teaspoon Dijon mustard 1 ounce ham, sliced 1 slice Swiss cheese 1 tablespoon grated Gruyere Directions Preheat oven to 375 degrees. Cut a pocket in the croissant. Spread mayonnaise and mustard in pocket. Stuff with ham and cheeses; place on a baking sheet. Bake until cheese melts, 10 to 12 minutes; serve. Rate it Print