Preheat the oven at 175 degrees Celsius.
Wash and cut the leek. Divide the tomatoes in half.
Mix the milk, cheese, eggs, salt, and citron pepper. Press the garlic clove in the mixture.
Fry the leek soft in the olive oil and the nutmeg. Add the red chard and fry for two more minutes.
Cover an oven form with the filo roll, let the dough hang over the edges.
Pour the ingredients in the oven form. Top the pie with the baby plum tomatoes.
Fold in the filo dough inside the oven form, and brush the dough with some olive oil.
Place the pie in the middle oven for fifty five minutes.
Take out the pie and let it cool down half an hour before serving it.