Weigh 60g of pasta per person and boil for 10-12 minutes. Put the sweetcorn and peas in this pan to cook for this duration too. You may wish to make stock to put into the water too, to give extra flavour.
while cooking, make the tuna mayo by simply mixing as much mayo and tuna together in a bowl.
add pepper and put to one side.
once pasta is ready, drain and mix the tuna mayo in.