Roasted Sausages with Grapes and Onions

You can use any kind of sausages in this cozy, autumnal dish, filled with roasted sweet grapes and vinegar-spiked onions. Spicy Italian sausages made from pork, chicken or turkey, fresh chorizo or merguez, will give the dish a kick, while milder sausages like chicken and apple, bratwurst or Weisswurst make for a gentler meal. Serve this on a bed of polenta or mashed potatoes, or with some crusty bread to sop up the vinegary, sausage-rich pan juices, and a green salad on the side. If you want to halve this recipe, reduce the oven temperature to 425 degrees; otherwise the smaller amount of food in the pan might get too brown.