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