First, make the delicious dipping sauce. In a small bowl, combine the mayonnaise, sriracha, and fresh lime juice. Whisk until the mixture is smooth and evenly combined, then set it aside.
Next, in a medium mixing bowl, add the drained tuna and use a fork to flake it apart. Add the panko breadcrumbs, beaten egg, chopped scallions, grated ginger, minced garlic, soy sauce, and sesame oil.
Gently stir all the ingredients together until they are just combined. Avoid overmixing, as this can result in tough tuna cakes. Divide the mixture into 8 to 10 equal portions and form them into patties.
Heat the vegetable oil in your skillet over medium-high heat. Once the oil is hot, carefully place the patties in the pan. Cook for 3-4 minutes per side until they are golden brown and crispy.