While pasta is cooking, prepare the deviled egg ingredients. Slice hard-boiled eggs lengthwise, removing yolks. Place yolks in a medium mixing bowl and set egg whites aside.

Mash egg yolks on a cutting board until fine bits. Add mayonnaise and yellow mustard to the mashed yolks. Whisk vigorously until smooth.

Whisk in kosher salt and ½ teaspoon paprika. Set bowl aside.

Slice egg whites into small cubes and set aside.

In a large mixing bowl, combine cooked macaroni noodles, chopped egg whites, diced red onion, and diced celery. Stir to combine.

Transfer deviled egg pasta salad to a serving bowl. Sprinkle with ¼ teaspoon paprika and optional sliced green onion. Serve immediately or refrigerate for up to an hour before serving.