1 1/2 Tbsp. butter
2 Tbsp. flour
1 cup milk
2 Tbsp. FRENCH'S® Classic Yellow® Mustard Sweet or FRENCH'S® Classic Yellow® Spicy Mustard
salt and pepper to taste
1 puff pastry sheet , thawed
14 slices thin sliced deli ham
1 cup shredded Gruyère cheese
1 egg , lightly beaten with a splash of water
PREHEAT oven to 425°F.
IN A HEAVY-bottomed saucepan, melt the butter over medium heat. Add the flour and stir constantly for about three minutes, until completely smooth and incorporated. Pour in the milk in thin stream while whisking. Keep on medium heat, whisking, for about 5-10 minutes, until the sauce thickens.
REMOVE from the heat and stir in the mustard, taste and season with salt and pepper.
USE a round cookie cutter to cut out 2 inch rounds of puff pastry. Use a smaller cookie cutter to score a circle inside each round without cutting down all the way through. Gently poke the center hole with a fork to dock.
TOP each round with a bit of mustard béchamel, a bit of ham, and shredded cheese. Top with a sprinkle of fresh pepper.
USE a pastry brush to brush the rounds with the egg lightly beaten with a splash of water. Bake for 15 minutes, or until golden and puffy. Enjoy hot with extra mustard and fresh thyme sprigs, if desired.