Step 1

Bring a large pot of salted water to a boil.

Step 2

Add the pasta and lower the heat to medium-low to maintain a slight boil. Cook the pasta until it reaches al dente stage.

Step 3

Drain the pasta, then rinse with cold water several times. Add the frozen peas directly to the cooling pasta so that they thaw as the pasta cools.

Step 4

Dice the onion into uniform pieces no larger than 1/4 inch.

Step 5

Then dice the celery larger (1/4 to 1/2 inch pieces). Chop the cheese into 1/2 inch pieces.

Step 6

Roughly chop the fresh parsley.

Step 7

Open the cans of tuna and drain them well. Place the tuna in a small bowl and break it up into large flaky pieces.

Step 8

Place the cooked pasta with peas in a large bowl. Add the red onions, celery, and cheese to the bowl and toss lightly.

Step 9

Pour the dressing over and gently stir until everything is well coated.

Step 10

Add in the flaked tuna and chopped parsley, and stir a few more times.