Prepare the cauliflower rice: If using a whole cauliflower, remove leaves and stem, chop florets into small pieces, and pulse in a food processor until rice-sized. Skip if using pre-riced cauliflower.

1. Sauté the vegetables: Heat 1 tablespoon of olive oil in a large skillet over medium heat. Add onion and sauté for 4-5 minutes until softened. Add garlic, ginger, peas, carrots, and corn (if using) and cook for 3-4 minutes.
2. Cook the cauliflower rice: Push veggies to one side and add the remaining oil. Add cauliflower rice and cook for 5-7 minutes, stirring occasionally, until tender but slightly crisp.
3. Season the rice: Stir in soy sauce, rice vinegar, and sesame oil (if using). Mix well, ensuring cauliflower rice is coated. Cook for 1-2 minutes, allowing flavors to meld.
4. Taste and adjust: Taste the fried rice and add more soy sauce, salt, or pepper if needed.
5. Serve: Garnish with chopped green onions. If desired, add protein like tofu, tempeh, or edamame. Serve immediately.