this takes 30 mins start to finish BUT actually you pour water on couscous and do a little light chopping, then sit twiddling thumbs until you've got to the 25th minute, then there's five mins at stove.
pour water on couscous, leave till soft, then mix in chopped toms, herbs, cucumber, feta, spring onions, whatever, with olive oil and lemon juice, S&P;
cut chicken breasts in half so they're very thin (or bash under clingfilm with rolling pin) and fling on v hot griddle pan (or frying pan) for 2 mins each side
(you can, if time, marinade chicken in OO, lemon juice, chilli flakes, crushed garlic etc but it tastes nice regardless)