Step 1

Position a rack in the middle of the oven and preheat to 375 degrees. Grease a 9-by-5-inch loaf pan with 1 tablespoon of oil.

Step 2

In a medium skillet over medium-high heat, heat the remaining 2 tablespoons of oil until shimmering. Add the onion, garlic and sage and cook, stirring occasionally, until the onion begins to soften and the mixture is fragrant (your kitchen will smell like Thanksgiving). Remove from the heat and let cool for at least 5 minutes.

Step 3

In a large bowl, combine the sweet potato, breadcrumbs, parsley, egg, salt and pepper. Add the onion mixture and thoroughly mix to combine. Add the turkey and gently mix until just combined (overworking ground meat can turn it tough).

Step 4

Transfer the mixture to the prepared pan and smooth out the top – this will ensure that the meatloaf bakes evenly. In a small bowl, stir together the mustard, maple syrup and tomato paste until combined. Spread the mixture evenly over the meatloaf.

Step 5

Bake for about 55 minutes, or until the meatloaf is golden brown, firm to the touch and an instant-read thermometer inserted into its center registers at least 165 degrees. Let the meatloaf cool in the pan for at least 10 minutes before unmolding, slicing and serving.