Make sure the tuna is well drained with as much moisture removed as possible. Mix together all the tuna cake ingredients (excluding avocado oil) and mix with a spoon or spatula until well combined. Form the mixture into 11-12 small tuna cakes, you may need to squeeze out a little moisture as you're forming them. Place on a plate and pop them in the fridge for a few minutes while you prepare the slaw and dressing.
Place the shredded cabbage, carrots and fresh herbs in a large bowl. Whisk or blend together all dressing ingredients until smooth and creamy. Drizzle the dressing over the slaw and toss to combine.
Heat a large nonstick skillet over medium-high heat and add a couple tablespoons of avocado oil. When the oil is hot, fry the tuna cakes for 2-3 minutes per side until golden brown and crispy, remove to a paper towel-lined plate. You'll need to work in 2-3 batches to fry all of the tuna cakes.
Serve tuna cakes hot on top of slaw with a big squeeze of lime, drizzle of sriracha mayo and sprinkle of sesame seeds.