Step 1

Make Green goddess dressing: Place avocado, vinegar, garlic, onion, sugar and lemon juice in a small food processor. Process until smooth. With motor running, add oil in a slow steady stream. Transfer to a bowl. Stir in yoghurt and herbs. Refrigerate for 1 hour.

Step 2

Toss zucchini, spinach and broccoli together in a bowl. Transfer to a serving bowl. Dollop with dressing and sprinkle with chia seeds. Serve.