Delicious Ham and Cheese Cake Croque Monsieur

1. Preheat your oven to 375°F (190°C).
2. Grease a baking dish with butter.
3. Lay half of the bread slices in the bottom of the baking dish.
4. Top the bread slices with the ham, followed by half of the cheese.
5. Place the remaining bread slices on top.
6. In a saucepan, melt the butter over medium heat.
7. Whisk in the flour and cook for 2 minutes, stirring constantly.