Cut bread in half lengthwise;carefully hollow out top and bottom of loaf,leaving a 1-in.shell. cube removed bread. in a large bowl,beat eggs,milk,pepper and salt.add bread cubes and toss to coat;set aside.
In a skillet over med heat,cook sausage,onion until the meat is no longer pink;drain.add to the bread mixture.
Spoon filling into bread shells;sprinkle with cheese. wrap each in foil.
Bake at 400 for 20-25 min or until cheese is melted.cut into serving-size slices.