Preheat oven to 450° F. In 15 1/2" by 10 1/2" jelly-roll pan, combine sausages, potatoes, onion, peppers , olive oil, 1/2 teaspoon salt, and 1/4 teaspoon black pepper; toss to coat. Roast sausage mixture 30 to 35 minutes or until potatoes are fork-tender and sausages are lightly browned, stirring once halfway through roasting.