Roasted Chestnut And Hazelnut Soup

Name: Roasted Chestnut And Hazelnut Soup
Ingredients: 1/2 lb peeled chestnuts (roasted, boiled or pre-packaged), roughly chopped; 4 tsp unsalted butter; 1/3 cup Bacon or pancetta, diced; 1 large yellow onion, chopped; 5 x ribs celery, chopped; 2 x carrots, peeled and chopped; 2 x cloves garlic, chopped; 1 tsp dried thyme; 1 cup dry white wine; 6 cup rich chicken stock; 1 cup hazelnuts, toasted, skinned and coarsely chopped; 1 cup heavy cream; 3 tsp Frangelico (optional); 3 x salt and pepper, to taste