In a large bowl, stir together first ten ingredients until they just hold together.
Shape 8 patties using 1/3 cup of packed tuna mixture per patty.
In a large nonstick skillet, heat oil over medium. Cook cakes until golden brown and crisp on the outside, about 2 minutes per side. Serve warm, accompanied by sweet chili sauce, and garnished with lemon, basil and/or cilantro sprigs.