Nitrox, when you do try that same recipe with some portabella mushrooms. I marinate the shrooms for about 10 minutes. When you put them on the grill do not put the underside of them down on the grill. This will do two things. It will stop them fom coming apart and it will hold the marinade like a cup as they cook. If your grill needs to be good n hot. Grill them for 2 minutes then turn them 90 degrees to get a nice cross hatch grill mark. Another two mintes then flip them allowing the excess marinade to come out. I would NOT use the same marinade on the emu and the shrooms together as that would be just a bit much. The shrooms make a nice topping for a steak. When you bring them in slice them in strips and lay then on the plate or better yet right on top on a nice fillet