Croque Monsieur

In 1-quart saucepan, melt 1 tablespoon margarine over medium heat. With wire whisk, stir in flour and cook 2 minutes or until mixture browns slightly, stirring frequently. Add milk, pepper, nutmeg, and salt; heat to boiling, stirring until sauce thickens. Remove from heat.

To assemble sandwiches: Place 4 slices bread on work surface; top with Gruyère. Arrange ham over cheese, folding slices to fit. Spread about 2 tablespoons sauce on 1 side of each remaining bread slice. Top sandwiches with bread, sauce side down.

In nonstick 12-inch skillet, melt remaining 1 tablespoon margarine over medium heat. Arrange sandwiches in skillet with cheese layer on bottom. Cover and cook sandwiches 6 minutes or until bread is golden brown. Turn sandwiches over and cook 3 to 4 minutes longer or until bread is brown and cheese melts.