This is a Daphne Oz recipe. She likes to serve it alongside her Chile Jam Chicken, which I have posted as a separate recipe. Delicious side dish! Note: this serves two, but you can easily increase the amounts.
In a bowl, whisk the coconut oil, syrup, cinnamon and salt. Put the potato and peaches in 2 separate bowls. Pour 3/4s of the syrup mixture over the sweet potato and 1/4 over the peaches and toss each. Spread the potato in an even layer in a large baking dish and roast for 10 minutes. Toss the potato and roast for 5 minutes more. Add the onion and roast for 15 minutes. Toss the potato and onion, add the peaches in an even layer, and roast 10 minutes, or until the potato and onion are fork tender and the peaches have caramelized.