Step: 1/8

Wearing rubber gloves, wash the nettles, shake dry and pick off the leaves.

Step: 2/8

Blanch the nettle leaves in plenty of boiling salted water. Drain, cool in ice water, then drain again.

Step: 3/8

Peel the kohlrabi and the sweet potatoes, then halve and thinly slice. Reserve the kohlrabi greens.

Step: 4/8

Mix the kohlrabi, sweet potatoes and nettles, sprinkle with salt and place in a casserole dish.

Step: 5/8

Whisk together the eggs and milk. Season with salt, pepper and some freshly grated nutmeg.

Step: 6/8

Add the milk to the vegetables and bake in a preheated oven at 200°C (180°C fan, gas 6) for 15 minutes.

Step: 7/8

Meanwhile, blitz the wholegrain bread to crumbs in a blender. Grate the cheese and mix with the breadcrumbs.

Step: 8/8

Scatter the cheese and bread mixture over the casserole and bake for 40 minutes. Garnish with the kohlrabi greens.