Pre-heat your oven to 200C
Wash & cut your cauliflower into florets
Steam in a steam pan for 3mins
Whilst you wait to make your pesto - simply blitzing all the remaining ingredients into a sauce...
Line an oven tray with foil
Place your steamed cauliflower on the oven tray (test if ready by sticking a knife through one of the floret stems and it should poke through - be careful not to over steam otherwise the cauliflower will become a mush)
Place your taco shells in the oven as per instructions and meanwhile...
Coat your cauliflower in coriander & spinach pesto and top up with grated cheese
Remove taco shells from oven (usually it takes 2mins
Turn oven to grill and grill for 5mins
Fill your shells and serve
Sauce up with a spicy sauce if you fancy
You can also BBQ your cauliflower which would taste even better