Quinoa & feta salad with roasted vegetables

INGREDIENTS

• 200g quinoa
• 3 tbsp olive oil
• 1 red onion , peeled but left whole, then cut into 1cm thick round slices
• 2 peppers , red, yellow or mixture, deseeded and cut into chunky long wedges
• 200g baby courgettes , halved lengthways
• 3 garlic cloves , unpeeled
• zest and juice 1 lemon
• pinch of sugar
• small pack flat-leaf parsley , roughly chopped
• 200g pack feta cheese