Classic, flavorful, heart-healthy Classic Tortilla Soup is perfect for a warm dinner on a cold night. Simple to prepare; add shredded chicken for a heartier dish and top with tortilla chips for some extra crunch.
Heat the oil in a saucepan.. Add the finely chopped onion and fry for 1 minute. Add in the flour and cook for 2 minutes, stirring all the time.Gradually stir in the stock with salt and pepper.Bring to the boil and simmer for 15 minutes, keep stirring until thickened.