In a large bowl, whisk together the cream cheese and evaporated milk until the mixture is smooth, although a few lumps are acceptable.

Ingredients: 8 oz. cream cheese, 1 (13 oz.) can evaporated milk

Add the whole milk to the mixture, followed by the salt, Cajun seasoning, mustard powder, and nutmeg. Stir in half of the shredded cheese mixture.

Ingredients: 1½ cups whole milk, 1½ tsp. salt, 1 tsp. Cajun seasoning, ½ tsp. dry mustard powder, ⅛ tsp. ground nutmeg

Taste the mixture to check the seasoning and adjust if needed. Then, stir in the beaten egg. Ingredient: 1 large egg

Combine the cooked macaroni with the milk and cheese mixture, stirring well. Pour everything into the prepared casserole dish.

Ingredients: 8 oz. elbow macaroni, 2 tablespoons salted butter

Evenly sprinkle the remaining shredded cheese over the top, and add some freshly ground black pepper if desired.

Ingredient: Fresh black pepper

Bake the dish in the preheated oven for 30-35 minutes, or until the cheese on top is melted and browned and the filling is bubbly.

For a browner top, place the dish under the broiler for 2-3 minutes. Allow it to cool slightly before serving.