Clean, wash and cut the leek into rings. Peel and wash the carrots, cut them into halves lengthwise and cut them into pieces. Put leek and carrots in boiling salted water and cook for about 3 minutes. Drain the vegetables in a sieve.
Meanwhile heat the fat in a pan, add the potato noodles and fry over medium heat for about 4 minutes, turning, and remove. Cut the bacon cubes into smaller pieces and fry them in the pan for 2-3 minutes until crispy.
Add sour cream and milk and season with salt, pepper and nutmeg. Grease 4 ramekins (approx. 14 cm Ø, 4 cm high). Spread the potato noodles, vegetables and bacon sauce evenly in the ramekins.
Sprinkle with cheese. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 5 minutes.