Heat the olive oil in a medium saucepan or soup pot over a medium heat.
Add the garlic & ginger paste and cook for 1–2 minutes, stirring regularly, until fragrant.
Add the mushrooms and carrots. Cook for 3–4 minutes until they begin to soften.
Stir in the pak choi and spring onions and cook for a further 1 minute.
Add the soy sauce, brown sugar and water. Stir well and bring to a gentle simmer.
Add the instant noodles and cook according to the packet instructions, usually 2–3 minutes.
Stir through the spinach during the final minute of cooking, allowing it to wilt into the broth.
If using a protein boost such as tofu, cooked chicken or edamame beans, add it now and heat through.
Divide between four bowls and serve immediately. If using boiled eggs, place half an egg on top of each serving.