Preheat the oven to 180°C.
Slice the peppers into 1cm thick strips, then chop the spring onion. Cut the tomatoes in half. Scatter them into a baking dish.
Add the herbs, olive oil, balsamic vinegar, chilli flakes and salt & pepper. Toss well. Bake in the oven for 20-25 minutes, until tender.
Meanwhile, cut the bread into cubes or chunks and toss with the oregano, garlic and about 2 Tbsp olive oil. Scatter them into a tray and bake for 5 minutes or so, until golden and crispy.
When the baked veggies are lightly caramelised and tender, transfer them to a mixing bowl. Stir in the croutons, olives, parsley. Serve warm.