Recipe Notes (some of which may have been culled from comments on the recipe): I just used ground coriander and didn't toast it. This actually worked better than grinding my own coriander as when I had done so, no matter how much I ground it, it came out too coarse. I just spread the mixture on the sweet potatoes early and roasted them longer with the mixture on them. I also squeeze orange juice on the yams before cooking. Watch them as they tend to get a little brown. Butter can be made the day before so it is quick and easy the day of. I added a little more sugar and squeezed orange into the butter mixture to have a little more glaze.