Step 1: Prepare the Tuna: Drain the tuna thoroughly using a fine-mesh sieve or by pressing it gently with a fork. This step is important to prevent a watery salad. Transfer the drained tuna to a medium-sized mixing bowl, gently flaking it with a fork, being careful not to over-shred it.
Step 2: Combine Ingredients: Add the mayonnaise, dill pickle relish (or chopped pickles), celery, and red onion (if using) to the bowl with the flaked tuna. If desired, add Dijon mustard for an extra layer of flavor.
Step 3: Mix and Season: Gently mix all the ingredients together until well combined. Avoid overmixing, as this can result in a mushy texture. Season with salt and pepper to taste, starting with a small amount and adjusting as needed. Remember that pickles often contain salt, so taste before adding more.
Step 4: Chill and Serve: For optimal flavor and texture, cover the tuna salad and refrigerate for at least 30 minutes before serving. This allows the flavors to meld and the salad to chill thoroughly. Serve the tuna salad on bread, crackers, lettuce wraps, or as a topping for a green salad.
Optional Tips: For a tangier flavor, add a squeeze of lemon juice or a splash of pickle brine. Celery seeds or a pinch of dried dill can enhance the overall flavor profile. If you prefer a sweeter taste, use sweet pickle relish instead of dill pickle relish. For a creamier texture, use a little extra mayonnaise.