Grilled Sausages with Bell Peppers and Onions | America's Test Kitchen

Ingredients

• 3 red bell peppers , stemmed, seeded, and cut into 1/4-inch-wide strips
• 2 onions , halved and sliced 1/4 inch thick
• 3 tablespoons distilled white vinegar
• 2 tablespoons sugar
• 1 tablespoon vegetable oil
• 1/2 teaspoon salt
• 1/2 teaspoon pepper
• 1 (13 by 9-inch) disposable aluminum pan
• 2 pounds sweet Italian sausage
• 12 (6-inch) sub rolls (optional)