Grate cheese. Whisk eggs and milk. Add 100 g cheese. Season with salt, pepper and nutmeg. Pour mixture into four greased heat-resistant moulds (150 ml) and place in a pot.
Pour on so much water until the ramekins are half in the water. Bring to the boil and let it simmer for 30-35 minutes at low heat in a closed pot. In the meantime, rinse chicken filet cold and pat dry. Season with salt and pepper and fry in hot oil while turning for about 15 minutes. Clean and wash broccoli and cut into florets. Cook the florets in boiling salted water for 8-10 minutes. Drain broccoli. Puree one half with the cutting stick of the hand mixer. Season to taste with salt and pepper, add the remaining florets. Remove the flan from the pan with a knife and turn it over onto a baking tray.
Drain broccoli. Puree one half with the cutting stick of the hand mixer. Season to taste with salt and pepper, add the remaining florets. Remove the flan from the pan with a knife and turn it over onto a baking tray. Sprinkle with the rest of the cheese as you like and bake under the grill of the oven for a short time. Arrange one flan each with a sliced chicken filet and broccoli on a plate. Garnish with tomato florets and chervil if desired