Preheat your oven to 200°C (gas mark 6, 180°Fan) and line a roasting tray with parchment paper.
Wash the courgettes and cut the top and bottom of the courgettes off. With a sharp knife, slice the courgettes lengthways into 0.5cm to 1cm slices.
Place the sliced courgettes onto a lined roasting tray. Drizzle oil and brush it evenly over the courgettes, then sprinkle salt and black pepper on top.
Place the sliced courgettes in the oven and roast for 15 to 20 minutes or until softened and slightly crispy around the edges. Serve freshly baked or eat them cold.