Fill a large pot with water, adding a pinch of salt. Bring to a boil, then add the elbow macaroni, stirring occasionally. Cook until al dente. Drain promptly and rinse under cold water to stop cooking and ensure it doesn't stick. Let it drain thoroughly.
For the tuna, it's essential to drain it as thoroughly as possible to maintain the salad's desired consistency. If using tuna in water, press it gently to squeeze out excess liquid. After draining, flake the tuna with a fork, breaking down larger chunks to ensure even distribution throughout the salad.
Take a large mixing bowl, and therein combine the now-drained elbow macaroni, flaked tuna, finely chopped hard-boiled eggs, vibrant green peas, and the tangy-sweet bite of pickle relish.
Introduce the high-quality mayonnaise to this mixture. It's advisable to start with 1.5 cups, mixing it in thoroughly. Depending on your preference for creaminess, you can then decide to add more mayonnaise.
Seasoning is an art; add salt and freshly ground black pepper gradually, tasting intermittently. Achieving a perfect balance is key.
Once everything is perfectly combined, transfer your salad to a preferred serving bowl. For the best flavor melding and a refreshing taste, cover the bowl and refrigerate for at least 30 minutes.
After its chill time, remove the salad from the refrigerator. Stir gently once more to combine any settled ingredients and taste. If needed, make any last-minute seasoning tweaks.