Summer couscous salad

INGREDIENTS

• 250g couscous
• 250ml vegetable stock , boiling
• 400g can chickpeas , drained and rinsed
• 1-2 tbsp vegetable or olive oil
• 300g courgettes , sliced on the slant
• 300g small vine-ripened tomatoes , halved
• 250g pack halloumi cheese , thickly sliced and then halved lengthways
• 125ml olive oil
• 3 tbsp lime juice
• 2 large garlic cloves , finely chopped
• 2 tbsp chopped fresh mint
• ½ tsp sugar