Roasted Chicken with grapes

12 ounces spinach leaves 4 stalks celery , sliced on the diagonal 1/2 red onion , finely chopped 2 cups green grapes , halved 3 ounces blue cheese , crumbled[...]

1 chicken , cut into 8 pieces 3/4 teaspoon dried Italian seasoning 3/4 teaspoon salt 1 red bell pepper , cut in strips 10 ounces mushrooms , sliced 1 onion ,[...]