In a mixing bowl, combine tuna, breadcrumbs, egg, soy sauce, sriracha, green onions, cilantro, garlic, and ginger.
Mix well and form into small patties.
Heat vegetable oil in a skillet over medium heat.
Fry the tuna cakes for 3-4 minutes on each side until golden brown and crispy.
In a small bowl, mix mayonnaise, lime juice, and remaining sriracha for the spicy mayo sauce.
Serve the tuna cakes warm with a drizzle of spicy mayo.