Clean and wash the zucchini and cut them lengthwise into thin slices with a peeler. Peel and wash the potatoes and cut them into thick slices. Boil up the stock and add the zucchini slices.
Cook for about 1 minute, lift out with a skimmer and drain. Add potatoes to the boiling broth and cook covered for 8-10 minutes. Pour potatoes onto a sieve and let them cool down a little.
Put potatoes and zucchini on skewers. Wash the sage, dab dry and remove the leaves. Cut the escalopes in half, cover each with a large sage leaf and fold over. Pin them with a wooden skewer.
Wash the tomatoes, dab dry and cut in half. Heat the oil in a pan and fry the escalopes for 3-4 minutes, turning. Add the tomatoes, fry briefly and season with salt and pepper. Remove from the pan and keep warm.
Add 125 ml water and cream and stir in the sauce powder. Bring sauce to the boil, season with salt and pepper. Heat butter in a pan and briefly heat the skewers in it. Arrange the skewers with sage escalopes and cream sauce on plates.
Serve sprinkled with fresh sage leaves.