Ingredients
1
4 cup light mayonnaise1 tablespoon prepared horseradish
2 tablespoons Land O Lakes® Butter
1 cup thinly sliced onion rings
1 (8-ounce) package sliced mushrooms
1 (10-inch) round focaccia bread, sliced in half lengthwise
1
2 pound deli thinly sliced roast beef4 (3/4-ounce) slices Land O Lakes® Provolone Cheese
6 thin green and/or red bell pepper rings