Blanch the peas in boiling salted water for about 2 minutes. Drain and rinse under cold water. Wash and clean spring onions and cut into thin rings. Wash the mint, shake dry and cut the leaves into small pieces
Mix eggs and cream cheese. Stir in milk and mustard. Season with salt, pepper and nutmeg. Add peas, spring onions and mint
Roll out the short pastry and line a greased tart tin (approx. 23 cm Ø) with it. Cut off any protruding edges approx. 1 cm above the edge and fold inwards. Use dough remains for other purposes, e.g. for biscuits. Prick the base with a fork. Pour in the pea and egg mixture and bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for 30-40 minutes. Serve hot or cold