Croque Monsieur (aka fancy Grilled Cheese with Ham)

Steps

• 1

  Preheat oven to 400.
• 2

  Melt butter on low in small saucepan. Warm the milk slightly in the microwave (do not overheat). Stir butter for 2 minutes, being careful not to scorch. When butter is melted, add the flour and stir, then add the milk and whisk until sauce is smooth and thickened up. Remove from heat and add pepper, salt, nutmeg, 1/2 cup of Gruyere and all the Parmesan. Set aside, stirring occasionally.
• 3

  Toast bread on a baking sheet in the preheated oven, about 4 minutes each side.
• 4

  Add mustard to 4 of the slices, top with ham and 1/2 of the remaining Gruyere. Place remaining bread slices on top. Brush with cheese sauce and top with remaining Grueyere. Bake another 5 minutes, then broil for 2-3 minutes, until top gets bubbly and browned. Serve immediately.