Cook the chickpea pasta in a large pot of boiling salted water for 7 to 9 minutes until al dente.
Drain the pasta and immediately rinse with cold water to stop the cooking process and prevent sticking.
In a large mixing bowl, whisk together the Greek yogurt, Dijon mustard, lemon juice, garlic powder, onion powder, salt, and pepper until the dressing is homogenous.
Add the cooled pasta to the bowl with the dressing.
Incorporate the canned chicken, thawed peas, diced celery, and minced red onion.
Toss the mixture gently with a spatula until all components are evenly coated with the dressing.
Chill in the refrigerator for at least 30 minutes prior to service to allow the flavors to emulsify.