Spray a 9-inch square baking pan with nonstick cooking spray.

In 12-inch skillet, brown beef, onion and celery. Drain grease and season with salt and pepper.

In small bowl, beat egg, milk, 1 cup cheese and mustard together. Pour half of the mixture into baking pan.

Place 4 bread slices in bottom of pan. Spoon meat mixture evenly over bread. Place remaining 4 bread slices on top of meat.

Pour the remaining egg mixture over bread; sprinkle on ½ cup cheese.

Bake in preheated 325°F oven 35 to 40 minutes, or until set and lightly browned. Serve immediately.

Prepare recipe in advance. Cover casserole, refrigerate and bake later. Allow an additional 5 to 10 minutes bake time.

EACH SERVING (made with whole wheat bread) About 233 calories, 25 g protein, 27 g carbohydrate, 8 g dietary fiber, 5 g total fat (2 g saturated fat), 57 mg cholesterol, 16 mcg folate, 2 mg iron, 438 mg sodium

If you liked this casserole recipe, try out these others:

• Chicken Bacon Ranch Casserole 
• Layered Taco Casserole 
• Layered Italian Casserole 

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