Preheat oven to 400.

Combine vinegar and maple syrup in small saucepan; bring to a boil.

Reduce heat slightly and stir occasionally until reduced by half.

Set aside.

Dice squash into 1-inch cubes.

Slice onion into small wedges.

Combine squash and onion on a rimmed baking sheet

Drizzle with 1 tablespoon oil and toss to coat fully.

Bake for 15 minutes.

While squash and onions cook, dice pancetta into small pieces

Heat frying pan over medium; cook diced pancetta for 3-5 minutes or until crispy.

Drain pancetta on paper towel lined plate.

Dice apple into 1-inch cubes.

Coat with ½ tablespoon oil; toss.

After baking for 15 minutes, remove tray from oven.

Add apple to tray, and bake for an additional 5 minutes.

Transfer squash, onion, and apples to a large bowl.

Pour reduced dressing over it; stir well.*

Top with pancetta.

Serve.