For the easy green soufflé with spinach: Wash, drain and finely chop the greens. Heat the olive oil in a deep pan and add the onion and leek.
Leave over a medium heat for 5-6 minutes until translucent. Add the spring onions and greens. Turn up the heat and leave until all the liquid has evaporated. Season with salt and pepper and remove from the heat.
Add the feta and the Manouri cheese together with the herbs. 4
Generously butter a square or small rectangular heatproof dish. Line the bottom with half the slices of bread and top with half the filling. Repeat with another layer of the remaining bread and filling. Sprinkle with the crumbled cheese. Beat the eggs with the milk and pour into the baking dish. Leave to stand for 15 minutes.
Bake in a preheated oven at 170 degrees C, air setting, for approximately 30 minutes until risen and the top turns golden brown.