Combine: tomatoes, coriander, chilli, sweetcorn, beans,and spring onions. Mix lemon juice with olive oil and add to salad. Season with salt and pepper.
For the guacamole, roughly crush the avocado and mix the lemon juice and coriander through. Season with salt and pepper. Toast the tortillas in a toaster or in a non stick pan. Serve the tortillas with the guacamole and Mexican salad.