Ingredients
2 tablespoons unsalted butter
3 tablespoons all-purpose flour
2 cups hot milk
1 teaspoon kosher salt
1/2 teaspoon freshly ground black pepper
Pinch nutmeg
12 ounces Gruyere, grated (5 cups)
1/2 cup freshly grated Parmesan
8 croissants
Dijon
8 ounces honey ham, sliced but not paper thin
Preparation
