Spray 3 1/2 to 4-quart slow cooker with nonstick cooking spray. In medium bowl, combine soup, sour cream and cheese; mix well. Gently stir in roasted pepper strips.
Arrange half of potatoes in sprayed slow cooker. Top with half of sour cream mixture; spread evenly. Top with remaining potatoes and sour cream mixture, spreading evenly. Do not stir.
Cover; cook on low setting for 5 to 6 hours.