Yes, any type of thin-skinned citrus will work here. Satsumas or tangerines are great substitutes. The most critical attribute of whatever citrus that you select for this recipe—whether satsumas, tangerines, clementines, or smallish navel oranges—isn’t the tartness of the segments so much as the thickness (or, if you will, thinness) of the peel, which remains on the citrus while it’s candied to keep the lovely circles of segments intact and to impart an ever so slight bitterness to the stunningly sweet glaze as a little welcome contrast. Fear not, the rinds soften sufficiently to be fork-friendly and turn sweet enough to be palate-pleasing, but only if you use thin-skinned citrus. Thicker-skinned citrus such as regular oranges just don’t play nicely in the time allowed, and simmering them a little longer until they do turn tender brings bitter consequences, both in terms of taste and the inescapable fact that the citrus segments tend to sag and fall apart. That said, if you can only find thick-skinned citrus, we have a fix for you. One of our veteran recipe testers, Helen Doberstein, was so taken by this simple and stunning recipe—yet vexed by the thick peels she was finding in grocery stores—that she kept tinkering until she had an aha! moment. She microwaved thicker citrus slices prior to simmering them.