Place the pecans in a single layer on a baking sheet.
Bake about 10 minutes or until pecans are fragrant and begin to darken.
Remove from oven, and set aside.
In a small saucepan, combine maple syrup, orange zest, cinnamon stick, and ground cloves. Bring to a gentle simmer.
Remove from heat, and let stand about 5 minutes.
Gently scoop out insides of the baked sweet potatoes, and place in a heatproof bowl. Using a potato masher or large fork, mash until there are no lumps left.
Heat in microwave on HIGH for 3 minutes.
Remove the cinnamon stick from the warmed syrup, and discard.
Pour the syrup over the mashed sweet potatoes, and top with the toasted pecans.