Spray 3 1/2- to 4-quart slow cooker with cooking spray. In 4-quart saucepan, cook linguine 5 minutes in boiling water; drain. Place linguine in slow cooker. Add half-and- half, 1 cup of the cheese, the peas, mustard, ham and Alfredo sauce; stir gently to blend. Sprinkle with remaining 1 cup cheese.