Creamy Cheeseburger Soup

Name: Creamy Cheeseburger Soup
Ingredients: 455g (1lb) of extra lean ground beef; 1 onion, diced; 2 carrot, diced; 1 clove of garlic, chopped; 400g (14oz) of potatoes, peeled and diced - use a waxy variety of potato; 400g (14oz) of butternut squash, peeled and diced; 960ml (4 cups) of chicken broth; salt and black pepper; 360ml (1.5 cups) of 2% milk; 120g (4.2oz) of strong good quality cheddar, grated; 2 tablespoons of cornstarch; low calorie spray; handful of fresh parsley, finely chopped