For the spiced cauliflower rice, pulse the cauliflower in a food processor until it looks like grains. Toast the cumin in a non-stick frying pan in 1 tsp olive oil, add the garlic salt, paprika, oregano and chilli flakes, and fry for a minute before adding the cauliflower rice. Stir-fry for 4-6 minutes until the cauliflower is tender, and smells a little toasted. Season well with black pepper (and only a little salt if using garlic salt). Divide between bowls. Add the peppers on top, the avocado, and coriander leaves. Serve with lime wedges to squeeze over.