Instructions: Distribute the Colby cheese and roast beef equally over 4 slices of bread. Spread horseradish sauce over the roast beef and sprinkle with French-fried onions. Place the Swiss cheese over the onions, then top with the remaining 4 slices of bread.

Spread the butter evenly over the top and bottom of each sandwich.

Preheat a large skillet or griddle over medium heat. Cook sandwiches, in batches if necessary, for 2 to 3 minutes per side, or until golden and the cheeses are melted. Serve immediately.

This recipe yields 4 servings.

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