Slice the cabbage into thin slivers and place them into a clean glass jar
Combine the vinegar, water and sugar in a small saucepan, place over low heat and stir until the sugar is dissolved.
Add the cumin seeds and black peppercorns, turn the heat to medium high and bring to boil
Allow to cool slightly, then pour the brine over the cabbage slivers until the cabbage is submerged. Set aside for at least 3 hours, or up to a week in the fridge to allow the flavours to develop further
Baked Spicy Fish
Pre-heat the oven to 190°C
Combine the spices and lime juice together, then coat the barramundi fillets in the marinade. Place the fillets onto a baking sheet lined with parchment, then season generously with salt and pepper
Bake for 16-20 minutes, until the fish is firm. Set aside and allow to cool
Corn Salsa
Finely dice the jalapeno & red onion, then combine with the corn kernels
Healthy Lime Crema
Combine all of the ingredients in a small bowl, and whisk until smooth
To Assemble
Crumble the fish fillets into bite-sized chunks, then distribute them among the taco shells
Fill each shell with some pickled cabbage and corn salsa
Drizzle with the lime crema, then garnish with coriander, jalapeno slices and spring onions