Slice kumquats. If they're small, this may be in half. If they're large, you may want as many as 4. Refer to Post photos.
De-seed the kumquats using a paring knife. This is optional. Refer to Post Instructions.
Dissolve the sugar in the water by bringing to a boil. Simmer until the sugar is completely dissolved. Add the sliced kumquats, the sliced ginger, and the whole spices. Simmer until the kumquats are tender (about 15 minutes).
Remove the saucepan from the heat, and allow the mixture to completely cool. Add the orange liqueur if using.
Remove the ginger "coins" and the spices. Serve immediately, or refrigerate.
