Combine all ingredients in 4-quart slow cooker sprayed with nonstick cooking spray. Cook covered on HIGH 3 hours or until macaroni is tender. Stir well before serving.
TIP: Make it Mexican! Just before serving, stir in 1/4 cup prepared salsa, then top, if desired, with 2 Tbsp. chopped green onions.
Cost per recipe*: $6.50.
Cost per serving*: $1.63.
*Based on average retail prices at national supermarkets.