Bok choy stir-fried with garlic sauce

2 teaspoons peanut oil
10 cloves garlic, crushed
1 tablespoon chopped fresh ginger
1/4 cup vegetable stock
1 red capsicum, cut into 1cm squares
2 carrots, halved lengthways and thinly sliced
4 cups sliced bok choy or green cabbage
1 teaspoon sugar
2 teaspoons sesame oil

1. Heat the peanut oil in a large nonstick frying pan over moderately low heat. Add the garlic and ginger and cook for 1 minute or until slightly softened. Add the stock and 1/4 cup water, cover and cook for 7 minutes or until the garlic and ginger are very soft.
2. Add the capsicum and carrots and cook for 1 minute. Add the bok choy and toss until well coated. Sprinkle with the sugar and a pinch of salt and cook for 4 minutes (6 minutes if using green cabbage) or until tender. Drizzle with the sesame oil and serve hot.