To me a big part of the fun of cooking meals traditional elsewhere is to do it "right". So I'd like to try to approximate using a couscousier as I play with my new North African ingredients. Almost all of the couscous I've been able to find (even on Amazon) is either labeled "quick cooking", or there are instructions on the box that say basically to add water, bring it to a boil, cover and let it sit for five minutes. I've found some couscous that doesn't offer any instructions, leaving it a mystery, but nothing that clearly says, "This is the real stuff, it takes time to cook." There is even couscous in the bulk aisle of my local grocery that has no instructions. I thought, "AHA! This must be the stuff". I called the company to be sure, but alas, same quick-cooking stuff.  I look at this recipe though Traditional North African Couscous and it seems pretty clear that this recipe does not refer to a product that can be made adequate by treating it like Stove-Top Stuffing. What gives? Is there such a thing as non-quick cooking couscous? If so, can you tell me how to get a hold of some? 
This cut would benefit from a relatively slow roast. I would thickly slice a few onions and put them in a dutch oven. Then rub the beef with mustard, salt and pepper, place on the onions, cover with a damp piece of baking parchment, put the lid on and roast at about 340F for 4 hours.  The fat will render out of the meat and the onions will caramelise beautifully in it. The meat should be fork tender and delicious. 