Step 1
Heat the oven to 220C and line or lightly oil a large tray. Cut the red onion into wedges and the courgettes into thick half-moons, then toss them with the cherry tomatoes, 2 tablespoons olive oil, a pinch of salt, and a little black pepper. Spread the vegetables out well and start them roasting first so they get a head start on caramelization.
