Prepare Tuna Filling: In a bowl, break up the canned tuna. Mix in mayonnaise, mustard, salt, black pepper, diced jalapeños, chopped cilantro, diced red onion, and freshly squeezed lemon juice until you achieve a smooth and creamy consistency.

Toast Bread: Take slices of sourdough bread and grill or press them until they are crispy and lightly golden.

Build Sandwich: Spread a generous layer of pesto on one side of each toasted piece of bread. Next, layer sliced avocado and tomato, then spoon on a hearty helping of your creamy tuna filling.

Add Optional Aioli: Spread chipotle aioli on the top piece of the bread before sealing the sandwich together.

Seal and Serve: Close the sandwich and cut it in half for easy handling. Enjoy with your favorite hot sauce.