Quinoa salad with grilled halloumi

Name: Quinoa salad with grilled halloumi
Prep time: 15 min
Cook time: 25 min
Total time: 40 min
Cuisine: Mediterranean
Ingredients: 3 tbsp extra-virgin olive oil; 1 small red onion sliced; 1 large roasted pepper from a jar, thickly sliced, or a handful of ready-roasted sliced peppers; 200g quinoa; 500ml vegetable stock; small bunch flat-leaf parsley roughly chopped; zest and juice 1 lemon; large pinch sugar; 250g pack halloumi cheese cut into 6 sliced