For the lukewarm potato and zucchini salad, first peel and finely chop the onion. Cut the sausages into slices. Peel the potatoes and cut into slices. Wash the zucchini and cut into cubes.
Mix all ingredients for the marinade.
Heat some oil in a pan and sauté the onion until translucent. Add the sausages. Add zucchini and potatoes and sauté briefly.
Mix the vegetable mixture with the marinade.
Serve the lukewarm potato and zucchini salad immediately.