Absolutely Ultimate Potato Soup

INGREDIENTS

• 1 pound bacon, chopped
• 2 stalks celery, diced
• 1 onion, chopped
• 3 cloves garlic, minced
• 8 potatoes, peeled and cubed
• 4 cups chicken stock, or enough to cover potatoes
• 3 tablespoons butter
• 1/4 cup all-purpose flour
• 1 cup heavy cream
• 1 teaspoon dried tarragon
• 3 teaspoons chopped fresh cilantro
• salt and pepper to taste