I made this recipe tonight using center cut boneless pork chops instead of chicken and it was delicious! I roasted the sweet potatoes and onion, covered, in a 425 oven for about 30 minutes (with the salt, pepper, thyme and some of the maple syrup). Then I browned the chops just a bit in a skillet with olive oil, drizzled them with maple syrup and added them to the sweet potatoes and onions, turned the oven down just a bit (maybe to 350) and cooked it, uncovered for another 20 minutes.
Since regular maple syrup is super expensive, I actually just used light maple pancake syrup - like Mrs. Butterworth's or something. Maybe the flavor would have been different with the good stuff, but it was sure good with the cheap stuff!
I love an easy, inexpensive and delicious recipe!