Toss sweet potatoes with the olive oil, maple syrup, salt and pepper on a baking sheet. Roast for 15 minutes in the oven.
Remove from oven and transfer the sweet potatoes to a food processor.
Add the onion, garlic, flours, breadcrumbs and spices to the food processor. Process until well combined and mixture starts to form a ball. Season with salt and pepper to taste.
With wet hands, roll the mixture into tot shape and place on the same baking sheet.
Broil the tots 2-3 minutes per side until browned.
Make the dipping sauce by whisking the mustard and maple syrup together in a small bowl.
Serve the tots hot, straight out of the oven with the dipping sauce.