Arrange chicken in a 13x9-in. baking dish coated with cooking spray. Sprinkle with paprika. Bake, uncovered, at 350° for 15 minutes., Meanwhile, in a large nonstick skillet, saute mushrooms in butter for 5 minutes. Add the sherry or broth, green onions, garlic, salt and pepper. Bring to a boil. Pour over chicken. , Bake until a thermometer reads 165°, 10-15 minutes longer. Top with cheese. Bake for 3-5 minutes or until cheese is melted.