Mary Ellen's crock pot Macaroni and Cheese

My sister in law, Mary Ellen sent a crock pot recipe to me to share. Crock pot recipes are my favorite, what is better than getting home from work and having dinner ready? Thanks Mary Ellen, this sound like a new favorite!

From Mary Ellen:
So I was reading your blog and couldn't resist sending you my favorite Crock Pot recipe...macaroni and cheese! It's so great to throw it in the pot and plug it in...voila! Four hours later you have a yummy side dish.

Cooking spray
1 1/2 cups skim milk
1 can (15 oz.) skim evaporated milk
1 egg
1/4 tsp. salt
1/8 tsp. black pepper
1 1/2 cups shredded sharp Cheddar cheese
2 cups (8 oz.) uncooked elbow macaroni

Spray the crock pot with cooking oil spray. Pour milk, evap. milk, egg, salt & pepper into the crock pot and whisk. Add cheese and macaroni. Stir gently to mix. Turn the cooker on low and cook for 3 1/2 to 4 hours or until custard is set in the center and the macaroni is tender. Serve at once. Serves four as a main dish or six as a side dish.