Orange- Glazed Chicken

4 boneless, skinless chicken breasts
¼ c. orange marmalade, divided
1 c. bread crumbs

¼ c. Kraft Zesty Italian dressing
6 c. spinach leaves
1 medium orange, cut in slices

Preheat oven to 400. Spread chicken breast w/ 2 T. of marmalade. Empty bread crumbs in shallow dish. Add chicken, turn to evenly coat both sides. Place chicken in baking dish. Bake 25 minutes or until done. Mix dressing with remaining 2 T. marmalade. Add to spinach; toss to coat