Cook the spaghetti following
pack instructions. Meanwhile, heat
the oil in a pan, tip in the onion and
cook for 5 mins or until soft. Add
the garlic and tomatoes, and cook
for a few mins more.
Stir through the sardines, breaking
them up lightly with the back of a
spoon. Add the olives and capers,
season and heat through. Toss in the
cooked, drained spaghetti, a splash
of the cooking water and parsley.