Oven-roasted ratatouille

Ingredients (6 servings): 60ml (¼ cup) extra virgin olive oil 1 (about 400g) eggplant, cut into 4cm pieces 2 zucchini (baby marrow), trimmed, halved lengthways, coarsely chopped 2 red onions, halved, cut into wedges 1 red capsicum (bell pepper), halved, seeded, cut into 4cm pieces 1 yellow capsicum (bell pepper), halved, seeded, cut into 4cm…