Ingredients: 
2 (12-ounce) packages STOUFFER'S® Spinach Soufflé, defrosted* 
6 boneless, skinless chicken breast halves, seasoned with salt and pepper 
2 tablespoons vegetable oil 
2 cups cooked white rice 
1 cup milk 
1 cup shredded Swiss cheese, divided use
1/4 cup chopped onion 
2 teaspoons Dijon mustard 
1/2 teaspoon salt 
1 cup coarse fresh breadcrumbs 
2 tablespoons butter or margarine, melted