To make cauliflower rice, grate cauliflower using a box grater or cut cauliflower into florets and process using a food processor. If using a food processor, process in small batches. Set aside in a large bowl.
Heat oil in a large saucepan or skillet on medium-high heat. Add onion, garlic, ginger and cook until onion is soft about 3 minutes.
Add turmeric, cumin, coriander, and cook until fragrant. Stir in the bell pepper and carrots, cook stirring for a minute.
Stir in the cauliflower rice to coat, add the coconut milk and cover to cook for 8 minutes, stirring occasionally to prevent the cauliflower from sticking. Stir in spring onion, salt, and pepper to taste.