Low Carb Creamy Chicken Mushroom Soup

Ingredients

• 1 pound boneless chicken breast
• 8 cups chicken broth
• 1/3 cup dry sherry
• 1 tablespoon cornstarch
• 1 teaspoon dried thyme
• 18 ounces sliced mushrooms
• 1 teaspoon fresh chopped rosemary
• 1/4 cup chopped parsley
• 1 large sweet onion
• 2/3 cup heavy cream
• 2 tablespoons unsalted butter
• 5-6 cloves garlic
• 1 cup chopped celery