Caprese Chicken Lasagna

Name: Caprese Chicken Lasagna
Prep time: 30 min
Cook time: 30 min
Total time: 1 h
Cuisine: Italian
Ingredients: 1 Onion, chopped roughly; 2 Carrots, chopped into small chunks; 2 Celery Sticks, chopped; 1/4 cup extra-virgin Olive Oil; 450 grams Chicken Fillets, cut into small stir-fry pieces ( 1 pound ); 1/2 cup Dry Red Wine; 2 cans (410grams each) Chopped Tomatoes, (14 oz each); 2 teaspoons Sugar; 1/2 cup Chicken Stock; 1 cup Basil Leaves, torn; Salt and Black Pepper, to taste; 6 tablespoons Butter, melted; 6 tablespoons Flour; 3 cups Milk; 1/2 cup Mozzarella Cheese, grated; 8 Spinach Lasagna Sheets