Step 1

In a large saucepan, cook orzo per package instructions. Drain pasta and rinse with cold water, then set aside.

Step 2

In a large mixing bowl (I like to use this 13-quart mixing bowl), whisk together mayonnaise, pickle relish, dill weed, garlic powder, and salt and pepper to taste.

Step 3

Add cooked pasta, tuna, peas, celery, and red onion to bowl, then use a spatula to thoroughly toss and mix ingredients together.

Step 4

If desired, chill for 1 hour to let flavors marinate.

Step 5

Serve as desired.