Cut the onions into wedges, about 1/2" thick on outer edge.
5
Toss the vegetables with enough olive oil to coat them, liberally.
6
Season with salt and pepper.
7
Spread the vegetables on a large baking sheet and scatter the sausage on top of the vegetables, roast in a 375 degree oven until the sausages are browned and cooked through and the potatoes are tender, about 30 to 45 minutes.