Heat the oil in a wok and briefly stir fry the spring onions for a minute then scoop out with a slotted spoon.
Reduce the heat and fry the sausages for 6-7 minutes, turning so that they brown evenly.Remove the sausages from the pan and pour away all but 1 tbsp of the oil.
Increase the heat and stir fry the greens for a couple of minutes, adding the crushed garlic, soy sauce and a tbsp of water half way through.Put the greens into serving bowls.
Return the sausages to the pan then add the Hoi Sin Sauce and the water. Bubble it up until the sauce is reduced and sticky.
Add the spring onioks then spoon the sausages and spring onions over the greens.
Sprinkle over the sesame seeds and serve with some plain boiled rice if youre not doing low carbs.