Peel and dice sweet potatoes and boil in salted water until soft. Steam well, press through the fine perforated disc of the potato, juice and spaetzle press FORCE ONE® and let cool.
Mix sweet potatoes, flour, semolina, eggs and salt to a viscous dough. Add a little mineral water if needed. Beat the dough until it bubbles.
Bring salted water to a boil in a large pot. Press the dough in portions through the coarse perforated disc of the FORCE ONE®.
As soon as the spaetzle float to the top, lift out PRIMELINE with a slotted spoon.
Wash sage leaves, pluck leaves from stems, spin dry in SPEEDWING® multishredder with spinner and cut into strips.
Clean mushrooms, halve or quarter depending on size. Sauté in oil, press garlic into it, add sage strips and fry a bit. Season with salt and pepper, melt the butter in it and keep warm.
Season steaks with salt, add oil to pan and heat until very hot.
Fry steaks for 2 minutes on each side until medium. Wrap in aluminum foil and let rest for another 5 minutes.
Meanwhile, lightly fry the spaetzle in butter, arrange on plates with the sage mushrooms and steaks. Drizzle with the mushroom stock and serve.