Set the slow cooker to low. Cook and drain macaroni. In a saucepan over low heat, melt the butter and cheese; remove from heat. Add eggs, sour cream, soup, salt, milk, mustard and pepper. Stir well. Add drained macaroni and stir. Pour into preheated slow cooker. Cook for 3 hours. **NOTE: You can add additional cheese on top when there's 10 minutes left for cooking. **VARIATION: This can be cooked in the oven, covered at 350 degrees F for 45 minutes. |