Crush or finely chop the garlic. Blend the prawns in a food processor (see Cooking tip) using short pulses until the mixture is smooth and comes together. Combine the prawn, garlic, sesame oil, 1 egg and 1 tsp soy sauce in a large bowl. Stir in 1 tbs plain flour, season with salt and pepper and gently mix to combine.
Step 2 — Assemble tacos
Using damp hands, evenly spread the prawn mixture over each tortilla. Sprinkle over the sesame seeds and, using your fingertips, gently press the seeds into the prawn mixture.
Step 3 — Fry prawn toast tacos
Heat 2 tsp vegetable oil in a large frypan over medium heat. Cook 2 tacos, prawn-side down for 2-3 mins until the prawn is cooked. Turn and cook for a further 1-2 mins until the tacos are golden. Remove from the pan and drain on paper towel. Repeat with the remaining oil and tacos.
Step 4 — Make sriracha mayo
Combine the sriracha sauce (see Make it milder) and 2 tbs mayonnaise in a bowl. Thinly slice the spring onion.
Step 5 — Serve up
Divide the prawn toast tacos and salad leaves among plates. Drizzle over the sriracha mayo and scatter with the spring onion. Enjoy!
Step 6 — Make it milder
Sriracha is a Thai hot chilli sauce. If you prefer less heat, reduce the sriracha in the mayo.