Chicken, Macaroni, and Cheese

INGREDIENTS

12 oz

Chicken breast, skinless boneless halves

1 cup

Cherry tomatoes

1/4 cup

Onion

2 cups

Packaged fresh baby spinach

1 6 1/2 ounce package

Semisoft cheese with garlic and herb, light

1 1/2 cups

Packaged dried multigrain or regular elbow macaroni

1 tbsp

All-purpose flour

Cooking spray, Nonstick

3/4 cup

Cheddar cheese, reduced-fat

1 2/3 cups

Milk, fat-free