Remove the outer leaves from the savoy cabbage. Cut off 8 large leaves, wash and cook in boiling salted water for 4-5 minutes (if necessary, steam the rest of the cabbage and serve as a casserole). Quench, dab dry.
Cut the thick vein of the leaf flat. Cut the feta into 8 equal-sized sticks. Place a slice of ham and a piece of feta on each cabbage leaf and roll up. Place in a flat casserole dish with the seam facing down.
Pre-cook the savoy cabbage rolls without sauce in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 15 minutes. In the meantime, peel and finely dice the onion for the sauce. Steam in hot fat until translucent.
Briefly sauté the flour in it. Gradually stir in 1/4 litre water, milk and stock. Bring to the boil, simmer for about 5 minutes. Coarsely chop the almonds. Grate cheese finely, melt half in the sauce. Season the sauce with salt and nutmeg and pour over the savoy cabbage rolls.
Sprinkle with the rest of the cheese and almonds. Bake at the same temperature for 20-25 minutes. Boiled potatoes taste good with it.