Step 1

Preheat the oven to 200C/Fan 180C/Gas 6

Step 2

Put the olive oil in a large, lidded frying pan. Add the courgettes and herbs and season with salt and pepper.

Step 3

Cover and cook gently for 10 minutes, stirring every so often, until the courgettes have softened slightly but are still al dente. The oil should have taken on a deep, rich green colour from the courgettes.

Step 4

Transfer to an oven dish. Whisk the crème fraîche, milk and flour together in a bowl and season with salt. Pour this mixture over the courgettes – it will not be enough to completely cover the courgettes, but this is fine – it will bubble up when cooking.

Step 5

Sprinkle over the cheese. Bake in the oven for around 25 minutes, or until brown and bubbling.