Italian Chicken & Broccoli with Shells

WHAT YOU'LL NEED

• 2 Tbsp. I Can't Believe It's Not Butter!® Spread, divided
• 1 lb. boneless, skinless chicken breasts, cut into cubes
• 1/2 tsp. dried Italian seasoning
• 1 small onion, chopped
• 1 1/2 cups water
• 1/2 cup 2% milk
• 1 package Knorr® Italian Sides™ - Creamy Garlic Shells
• 1 box (10 oz.) frozen broccoli florets, thawed