Cheesy ham and pretzel roll casserole

1. Heat oven to 350° F. Spray 13 x 9-inch (3-quart) glass baking dish with cooking spray. Place pretzel roll pieces in large bowl; set aside.

2. In 8-inch skillet, melt butter over medium heat. Add onion; cook 4 to 5 minutes or until tender and beginning to brown. Pour mixture over pretzel roll pieces in bowl; toss to coat.

3. In medium bowl, beat eggs, cream and mustard with whisk. Stir in ham and 1 cup of the cheese. Pour over pretzel roll mixture; toss to coat. Pour into baking dish. Top with remaining 1 cup cheese. Bake 33 to 36 minutes or until rolls are crispy on top and thermometer inserted in center reads 165° F. Let stand 5 minutes before serving.