Mix together cumin, coriander, paprika, and a pinch of salt in a large bowl, then add the juice from one lime. Toss in the fish fillets and cover, then set aside.

Finely slice the cabbage, and squeeze lime juice over it and season with salt. Set that aside, then chop the tomatoes into small pieces, leaving it on the cutting board.. Scoop out and mash up your avocado on the cutting board, then squeeze on lime juice and sprinkle in some salt.

Heat your grill to high, and line a baking tray with…