Place mayo, vinegar, sugar, parmesan, relish, mustard, salt, pepper, garlic powder, onion powder, curry powder, parsley, dill, and paprika into a large bowl and whisk until smooth.
Add in cooked pasta, red onion, celery, bell pepper, tuna, and optional peas, then use a rubber spatula to gently fold the mixture until everything as been coated in the sauce.
Cover and chill in the fridge until cold.
When ready to serve, stir, then taste and re-season, if necessary!
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