Prepare macaroni to al dente according to package directions. After macaroni is cooked, drain and rinse in cold water. Once macaroni has cooled down, drain well.

In a medium-sized mixing bowl, whisk together mayonnaise, mustard, sour cream, apple cider vinegar, sugar, salt, and pepper.

In a large bowl toss macaroni with ham, cheese, and peas.

Fold in mayonnaise mixture until pasta is well coated.

Cover with plastic wrap and allow to sit overnight.

If the salad seems a little dry after setting up overnight, add some milk a little bit at a time until salad becomes nice and creamy again.