1-First Step: Prep Ingredients: Drain the tuna thoroughly to remove excess moisture, preventing sogginess. Finely chop celery and onion, and mince the garlic. Prepare other optional ingredients if using.

2-Second Step: Mix Tuna Salad: In a medium bowl, combine the drained tuna, mayonnaise, chopped celery, minced onion, pickle relish, lemon juice, and garlic. Stir well to evenly distribute ingredients. Add optional pickle juice and red chili flakes for extra tang and heat.

3-Third Step: Season and Adjust: Season the tuna mixture with salt and freshly ground black pepper. Taste and adjust seasonings for preferred flavor balance. For dietary preferences, substitute mayonnaise with vegan or lighter alternatives here.

4-Fourth Step: Prepare Bread: Toast bread slices lightly to add texture and prevent the sandwich from becoming soggy. Alternatively, serve on fresh bread or use lettuce wraps for gluten-free options.

5-Final Step: Assemble and Serve: Spread the prepared tuna salad generously over one slice of bread. Optionally, add fresh lettuce or tomato slices for extra crunch and flavor. Top with the second slice of bread, cut the sandwich diagonally, and serve immediately. Store leftover tuna salad in the fridge covered and assemble fresh to maintain texture.