Potato Salad Soup

INGREDIENTS

• 5 tablespoons unsalted butter
• 1 onion, chopped
• 1/2 cup chopped celery
• 1/4 cup chopped carrots
• 2 cloves garlic, minced
• 2 tablespoons chopped fresh parsley
• 4 tablespoons all-purpose flour
• 1 1/2 cups chicken stock
• 1 1/2 cups milk
• 3 potatoes, cut into 1/4-inch slices
• 2 teaspoons Worcestershire sauce
• 1 1/2 teaspoons mustard powder
• 1 pinch ground allspice
• 3/4 teaspoon celery salt
• 1/2 teaspoon dried thyme
• 1/2 teaspoon seasoning salt
• 2 tablespoons white wine
• 1/4 teaspoon poultry seasoning
• 3 hard-cooked eggs, chopped