Bake at 350 degrees for 10 minutes or until lightly toasted.
Drain crabmeat, removing any bits of shell; set aside.
Bring whipping cream and sherry to a boil; boil 5 minutes.
Stir in Old Bay seasoning and next 5 ingredients.
Gradually add cheese, stirring until blended.
Set aside Saute celery, green bell pepper, and green onions in hot oil in a large skillet over medium-high heat 5 minutes or until crisp-tender Combine bread cubes, crabmeat, cheese mixture, vegetables, and mayonnaise, tossing gently Spoon into a 13*9-inch baking dish coated with cooking spray.
Bake at 350 degrees for 40 minutes or until bubbly.