Line a baking tray with baking paper and sprinkle with oil. Place in the oven and preheat (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer). Peel or clean, wash and cut carrots and peppers into fine strips. Clean and wash spring onions and cut them into rings. Crumble feta.
For the dough mix flour, baking powder, eggs, milk, mineral water and approx. 1⁄2 TL salt to a smooth dough. Pour evenly onto the hot baking tray. Sprinkle with vegetables and feta and bake in the hot oven for about 20 minutes.
In the meantime, wash the herbs, shake dry and cut finely. Mix with sour cream and season to taste with salt and pepper.
Pull the pancakes and baking paper off the baking tray. Roll up from the long side and cut into pieces. Serve with the herb cream.