Classic Chicken Casserole

INGREDIENTS

• 2 1/2 lbs. boneless, skinless chicken thighs
• 6 Tbsp. Hellmann's® or Best Foods® Real Mayonnaise
• 1 Tbsp. vegetable oil or sunflower oil
• 1 medium onion, chopped
• 2 cloves garlic, crushed
• 1 large all-purpose potato, peeled and grated
• 3 carrots, cut into bite-size chunks
• 1 leek, chopped
• 4 cups boiling water
• 1 tub Knorr® Homestyle Stock - Chicken
• 1 Tbsp. fresh thyme leaves *, chopped