Mom's Mac and Cheese Pasta Salad

Mom made this awesome salad a lot.  Somehow I lost the original recipe so I'm going on memory alone here.  

Mom's Mac and Cheese Pasta Salad

1 box elbow pasta
1 cup apple cider vinegar
1 red pepper, chopped
1 red onion, chopped
1/2 cup chopped celery
2 cups mild cheddar cheese (or American) in small cubes
1 cup Miracle Whip
1 tablespoon apple cider vinegar
1 tablespoon sugar
1 teaspoon black pepper
salt to taste

Prepare pasta according to package directions being careful not to overcook it.  Drain and rinse with cold water at least 3 times.  Pour a cup of vinegar over the pasta, toss to coat and set aside.  Let rest at least 15 minutes and then drain any remaining vinegar.

Mix the pasta, veggies and cheese together.  Prepare the dressing in a small bowl.  Combine the Miracle Whip, tablespoon of vinegar, sugar, pepper and salt.  Mix well.  Add about half to the pasta and toss.  Add more dressing as needed.  Chill two hours before serving.