Stephanie, the Crockpot Lady, had this posted on her blog. You do read her blog, don't you?
1/2 pound macaroni or hearty pasta
4 cups of milk
4 cups cheese
1/2 t kosher salt
1/2 t black pepper
1 T dried mustard
The Directions. Spray crock well with cooking spray. In a mixing bowl, whip egg and milk together. Stir in spices. Add cheese and noodles, and stir well to combine. Pour the mixture into the crockpot.It will be very liquidy.Cover and cook on low for 2-5 hours, or on high for 1-3. The cooking time will vary depending on