Scott bought a "flavor injector" (a syringe) at Target the other day. I had my doubts, but now that I've seen it in action, I'm a believer. He filled it with a mustard-anchovy paste mixture and pumped it into our (grass-fed) rump roast, along with some garlic slivers. It cooked quicker than we expected, so it got a little dried out, but it tastes fantastic!
Last night we ate it with broccolini, and tonight we roasted some carrots and parsnips to have on the side. I always forget how good roasted root vegetables are.