For this recipe, you can prepare the sauce while the pasta is cooking.

To Cook the Pasta

1. Bring a large pan of water to the boil.
2. Add the salt, together with the pasta.
3. Cook the pasta according to the packet instructions until al dente, about 10-11 minutes.
4. Meanwhile, prepare and cook the bok choy.

To Prepare the Bok Choy

1. Wash the boy choy and remove as much grit as possible.
2. If you are using baby bok choy, simply halve each bok choy.
3. If you are using large bok choy, separate the stem from the leaves. Slice the stem into 2 cm pieces, and either keep the leaves whole or cut them in half, depending on how leafy they are.

To Cook the Boy Choy

1. Heat the oil in the large wok or non-stick saucepan.
2. Sauté the bok choy stems (or baby bok choy halves) until the stems have softened slightly.
3. Add the garlic and cook for about 1 minute, or until it is fragrant.
4. Add the butter and let it melt.
5. Add the soy sauce.
6. Give everything a good mix.
7. Once the pasta is ready, transfer the pasta directly from the boiling water (do not discard the pasta cooking water) into the pan with the bok choy.
8. Add 1 small ladle (about 60 ml or 1/4 cup) of the pasta cooking water to the pan with the bok choy.
9. Add the bok choy leaves.
10. Give everything a good mix until the pasta is coated in the soy sauce mixture. Add more pasta cooking water if you need to create more of a sauce.
11. Season with freshly ground black pepper.
12. Serve immediately.