Prepare the Tuna: Drain the canned albacore tuna thoroughly, then transfer it to a mixing bowl. Add mayonnaise, chopped cilantro, and lime juice. Mix until coated, adding salt to taste.

Prepare the Avocado: Slice and peel the ripe avocado. Place in a bowl and squeeze remaining lime juice over it. Mash lightly, leaving some chunks, and season with salt.

Layer the Ingredients: On a plate, start layering with half of the avocado mixture, followed by half of the tuna mixture, and finish with half of the pico de gallo.

Repeat the Layers: Add the remaining avocado, tuna, and pico de gallo to create a second layer.

Serve and Enjoy: Serve immediately or chill briefly. Optionally, serve on lettuce leaves for a low-carb option.