Honey Mustard Chicken & Smashed Potatoes

The smooth and savory gravy is made right along as the chicken and potatoes cook. Wilting fresh baby spinach into the honey mustard smashed potatoes adds nutrients, flavor and color.
1 carton (24oz.) College Inn® Savory Chicken Simple Starter® Sauce
1/4 cup honey
1/4 cup Dijon Mustard
1 1/2 lb. gold potatoes, peeled and quartered (about 6 medium)
1.5 lb. boneless, skinless chicken breast halves, cut in half crosswise
8 oz. baby spinach (about 8 cups loosely packed), coarsely chopped