For two persons, mix 4egg yolks with natural yoghurt, seasoning and cheese.
Wilt a good handful of chard and sliced leek, in sufficient boiling water to cover the base of the pan and just enough cooking to blanche for a few minutes. Drain thoroughly. Add greens to yolk mix.
Whisk egg whites and fold into yolk mix with a spatula. Place in a buttered dish, scatter with extra cheese and bake at 200 C for approx. 20minutes until golden and well risen.
Recipe Notes
Works equally well with spinach or watercress but we happen to grow chard!