Dice the sweet potatoes (with the skin) into 1/2 inch cubes and place on a lined baking sheet. Drizzle with olive oil and season with kosher salt and pepper. Toss until evenly coated. Put the baking sheet into a 400 degree oven for 10 minutes.

As the sweet potatoes cook, dice the onion and apples into similar size chunks as the sweet potatoes. Cut the cooked chicken sausage in 1/2 inch slices. 

Add the onions, apples, and chicken sausage to the pan with the sweet potatoes. Drizzle with more olive oil and season with kosher salt, pepper, season salt, cinnamon, and half of the thyme leaves. Toss until evenly coated and put back into the 400 degree oven for 10 more minutes.

Add the dried cranberries, toss until evenly coated and return to the oven for another 10 minutes. Turn the broiler on high for an additional 2 minutes if you want the top crispy and brown.

Taste for seasoning, add more kosher salt, pepper, or season salt if needed. Serve with the remaining fresh thyme leaves sprinkled over top.