In a heavy-bottomed saucepan, whisk together the coconut milk, orange zest, orange juice, syrup, cinnamon, arrowroot powder, and salt until smooth and thoroughly combined.
Stir in the rinsed quinoa, dried cranberries, and shredded coconut.
Bring the mixture to a rolling boil over high heat.
Immediately reduce the heat to low, cover the saucepan, and let it simmer gently for about 20 minutes, or until the quinoa is plump and has absorbed most of the liquid. The consistency should be like a thick pudding.
Remove from heat and let it cool slightly.
Serve warm, or chill in the refrigerator to enjoy later.
Don't skip rinsing the quinoa! This crucial step removes its natural coating, called saponin, which can give it a bitter or soapy taste.