Meat – Standing Rib Roast

I'd use the recipe they have on their site for pork shoulder as a guideline, since it's very similar in terms of size and shape to a beef roast (just not as heavy).

They estimate 10 minutes per pound, which is more or less consistent with the per-side estimate of most broiler recipes (which is very similar to infrared cooking).

So start with an estimate of 40-50 minutes but do what they recommend and monitor the temperature very carefully.

I have to point out that 4-5 pounds is very heavy/large for high-heat cooking methods like broiling or grilling (or infrared); it's not the same as infrared "frying" a turkey or a leg of lamb which has a very high surface area/weight ratio. Steaks would no doubt come out great this way but larger roasts respond better to roasting, so don't be too surprised if your roast starts to get seriously charred on the outside before it's sufficiently cooked on the inside.

You might want to consider starting with smaller, 2-3 lb roasts, and move up the weight next time if those come out perfectly. Based on their claims, it should take roughly the same amount of time for one large item vs. two smaller items anyway.

For the US crowd, silverside is the part of the round closest to sirloin, so it's a working cut and fairly lean.

In order to keep this juicy you'll need to bard it, in other words add fat. I'd do this by wrapping the whole thing up in streaky (US style) bacon and then sear it at high temperature to give it that crust before turning it down and continue the roasting at a lower temperature. So turn your oven up full-whack and let it get good and hot, then rub your roast with some salt, then into the oven for 20 minutes, then turn it down to 160 and roast it until it reaches 120F/50c. Remove and cover with foil, then let it rest for at least 30 minutes. If you don't let it rest it won't get tender at all.

In all honesty silverside isn't a cut I would roast, and I've tried. It just too lean and has too much connective tissue to be tender. It does make a good braise though, which is what I'd do with it.