Giant couscous is not exactly oversized variety of couscous, contrary to what you might think...

Is couscous a grain?
Couscous is really pasta. It was recently the cause of The Weather Man’s epiphany and revelation, not entirely of a positive flavour. He had been convinced, poor soul, that couscous was a grain: wholesome, natural, unprocessed, rolling fields of couscous swaying in the gentle wind somewhere in the Middle East. I bet he wasn’t isolated in the belief.
Couscous is not a plant: it’s processed grain, whacked to shape of tiny or slightly bigger crumbs/lumps. Weirdly, it’s still pretty wholesome and good for us to eat – there are even couscous-based weight-loss programmes.
My secret suspicion is that it’s because it SO gets everywhere when you’re cooking it, only very little ends up on our plates. Joking aside, it is a slow-release carbohydrate and lower in calories than rice, thus keeping us full for a longer time.
Giant couscous origins
Israeli or giant couscous – also known as pearl couscous or ptitim – is pretend rice. During the 1950s austerity period in Israel, it was developed as a wheat-based substitute for scarce then rice. They jostled the durum wheat grains to shape approximating rice grains, later made to resemble real couscous.
Needs must, as always – and Jewish communities historically had to be naturally more resourceful than others; hence we’re thankful to them for pastrami and bagels, less so for gefilte fish.
It really is just the most fantastic canvas for a salad – throw anything in, season heavily and it will go down a treat. This features roasted red peppers, and however kosher (ha!) it may be to grab a jar of Spanish piquillos, it’s rather fun to grill a bunch of peppers black and peel them satisfyingly when sweated; it beats picking a scab anytime.
Similar salads
I love those big chunky grains-not-grains in salads. Giant cousccous is one of my favourites, bulgur wheat is another. I do pity those on gluten-limited diets: not only cakes are out of bounds but even healthy salads like these!