1. Preheat the oven to 425 degrees. Spread out butternut squash on the sheet and drizzle with 1 ½ tablespoons of olive oil.
2. Roast for 25 minutes, turning over once halfway through or until fork tender.
3. Meanwhile, melt butter in a skillet over medium heat. Add sage leaves and cook for 1-2 minutes or until just browned. Transfer from the skillet to a large bowl.
4. Slice the chicken sausage into rounds. Add ½ tablespoon of olive oil to the skillet and cook the sausage until browned on both sides, 2-3 minutes. Transfer from the skillet to the bowl.
5. Add the remaining olive oil to the skillet. Add apples and onion and cook for 5-7 minutes or until softened.
6. Transfer to the large bowl. Toss in roasted squash and season to taste with salt and pepper.