Peperonata roast chicken

Ingredients(4 servings): 2 red capsicum (bell peppers), seeds removed, sliced into 4cm strips 1 yellow capsicum (bell pepper), seeds removed, sliced into 4cm strips 2 tomatoes, seeds removed, sliced 1 long red chilli, seeds removed, finely chopped (optional) 1 onion, thinly sliced 2 garlic cloves, finely chopped 1 tablespoon red wine vinegar 1/3 cup (80ml)…