Press the Beans button and cook for the default time of 30 minutes. When timer beeps, let pressure release naturally for 10 minutes. Quick-release any additional pressure until float valve drops and then unlock lid. Drain any extra liquid.
Transfer black-eyed peas to a medium bowl. Allow to cool 10 minutes.
Toss in remaining ingredients. Cover and refrigerate 30 minutes or up to overnight. Serve chilled.