Step 1: Prepare the Tuna: Gently drain the tuna, ensuring excess water is removed. Flake the tuna into a medium-sized mixing bowl using a fork, breaking up any large clumps.
Step 2: Combine Wet Ingredients: Add the mayonnaise and fresh lemon juice to the flaked tuna. Stir gently to combine, ensuring the tuna is evenly coated. Avoid overmixing, as this can result in a mushy texture.
Step 3: Incorporate Vegetables and Herbs: Add the finely diced celery, red onion, and fresh dill to the tuna mixture. Gently fold in the ingredients until they are evenly distributed throughout the salad.
Step 4: Season to Taste: Season the tuna salad with salt and freshly ground black pepper to taste. Adjust the seasoning according to personal preference. For an extra layer of flavor, consider adding a pinch of red pepper flakes.
Step 5: Add Optional Avocado: If using avocado, gently fold it into the tuna salad just before serving. Be careful not to mash the avocado while mixing, as you want to maintain its creamy texture.
Step 6: Serve and Enjoy: Serve the tuna salad immediately on crackers, lettuce wraps, or whole-wheat bread. Alternatively, chill the tuna salad in the refrigerator for at least 30 minutes to allow the flavors to meld before serving.
For a variation, substitute Greek yogurt for mayonnaise for a lighter option. Consider adding a tablespoon of Dijon mustard for a tangy kick. Celery and red onion can be swapped out for other crisp vegetables, such as cucumber or bell pepper.