Roasted Vegetable and Chickpea Couscous Salad

Ingredients

• 450g orange sweet potato, peeled, cut into 2cm pieces
• 1 eggplant, cut into 2cm pieces
• 1 large red capsicum, halved, deseeded, chopped
• 1 red onion, cut into thin wedges
• 400g cup mushrooms, thickly sliced
• 1/4 cup olive oil
• 300g can chickpeas, drained, rinsed
• 1 1/2 cups couscous
• 1 1/2 cups vegetable stock
• 1 tbs butter
• 1/4 cup flat leaf parsley, finely chopped