Clean the leek and cut it in half lengthwise. Bring the stock to the boil, cover the leeks and cook them for about 6 minutes. Collect the broth. Let the leek cool down. Beat the escalopes a little flat and season with salt and pepper. First cover with strips of leek, then with ham and roll up.
Pin with roulade needles. Heat clarified butter in a pan and fry the roulade all around. Deglaze with stock and braise covered for 10-15 minutes. Cook the noodles in plenty of boiling salted water for about 5 minutes. Cut tomatoes in half and remove seeds. Cut tomato halves into small cubes. Drain noodles. Melt the butter, toss the tomatoes in it and add the noodles. Take out the roulade and cut into slices. Stir the sauce thickener and sour cream into the braising stock and simmer for another 1 minute. Season to taste with salt and pepper.
Cut tomato halves into small cubes. Drain noodles. Melt the butter, toss the tomatoes in it and add the noodles. Take out the roulade and cut into slices. Stir the sauce thickener and sour cream into the braising stock and simmer for another 1 minute. Season to taste with salt and pepper. Arrange roulade with sauce and noodles on a plate. Garnish with parsley