Place bread slices on surface. Spread 1 T cream cheese on two slices. Top cream cheese with desired amount of onion.

On the other two slices place Provolone cheese and top with roast beef slices.

Put sandwiches together. Brush melted butter on the outsides of all the bread slices.

Heat skillet or grill pan to medium heat. Place sandwiches on pan and cook about 3 minutes per side until golden brown and cheese is melted.