8. Gradually whisk in the milk and bring to a boil.
9. Cook the sauce, stirring constantly, until it thickens.
10. Remove the sauce from the heat and season with nutmeg, salt, and pepper.
11. Pour the sauce over the bread and ham in the baking dish.
12. Sprinkle the remaining cheese on top.
13. Bake for 25-30 minutes, or until the casserole is golden and bubbly.
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This Croque Monsieur Casserole is sure to become a new favorite in your household. Enjoy!
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