Cook the ditalini pasta according to package directions. Drain, place in a large bowl, and set aside to cool for 5 minutes.
Add the remaining ingredients to the bowl of pasta. Mix together until the pasta is well coated, the chunks of tuna are broken up and spread throughout the pasta, and the remaining ingredients are thoroughly mixed.
Serve immediately, or refrigerate for up to one day before serving at room temperature.
Notes
If you are making this a day ahead of serving: be sure to mix the ingredients again after taking the bowl out of the refrigerator. Because refrigeration can dry out the pasta salad, you may need to add a little bit of white wine vinegar, mayonnaise, and/or mustard to re-add moisture to the pasta salad. This tuna pasta salad will keep for up to 3-5 days in a sealed container in the refrigerator.