Cook the pasta for around 8 minutes until ¾ part done.
Heat the oil in a non-stick pan and sauté the onions and garlic until lightly browned.
Add the tomatoes and basil and cook for 15 minutes on a medium heat.
Stir in the tuna and sweetcorn, then season with salt and pepper.
Add the drained pasta into the pan with the tuna mix. Coat the pasta thoroughly and then transfer into a large oven proof dish.
Sprinkle the crisps and cheese on top and then cook for 20 minutes on 200C on the middle shelf.