Easy Chicken and Corn Chowder

INGREDIENTS

• 1/2 cup butter
• 1 small carrot, finely diced
• 1 stalk celery, diced
• 1 small onion, finely diced
• 1 clove garlic, minced
• 1/2 cup all-purpose flour
• 1 1/2 cups white corn kernels
• 1 1/2 cups yellow corn kernels
• 4 russet potatoes, diced
• 2 cooked rotisserie chicken breast halves, shredded
• 4 cups chicken stock, divided
• 2 1/2 cups half-and-half
• 1 pinch nutmeg
• salt and ground black pepper to taste