Once vegetables and apple are prepped, throw into a large bowl with 1 tbsp olive oil and garlic. Toss to coat the vegetables, sprinkle with salt and pepper. Line a cookie sheet with parchment paper, and spread out the vegetables into a single layer. Top with sausage.
I use the un-cooked chicken sausage, but you may use pre-cooked sausages (cook time will be the same). You can also use turkey or pork.