In a small bowl combine cheese and seasoning. Roll chicken pieces in cheese mixture to coat lightly. Set remaining cheese mixture aside. Arrange coated chicken pieces in an 8x8x2 inch baking dish.
In a small saucepan, saute green onion in butter/margarine until tender. Stir in flour, then add milk all at once. Simmer, stirring, until bubbly. Stir in drained spinach and pimiento and mix together. Spoon spinach mixture over chicken and sprinkle with remaining cheese mixture. Bake uncovered for 30 to 35 minutes or until tender and chicken juices run clear.