Other toppings, such as jalapeño peppers and fresh tomato salsa, also go really well.
You can also use taco shells instead of tortillas.
Gently fry onions for 5 mins in oil, until softened. Tip in beans, tomatoes and seasoning, then simmer for 10 mins, stirring occasionally.
Meanwhile, warm the wraps in the microwave on High for 1 min.
Take a large spoonful of beans and spoon along the centre of each wrap. Top with some grated cheese, a spoonful of guacamole and soured cream and a sprinkling of coriander or parsley. Wrap into a cigar shape and eat straight away.