1. Rub the chanterelles with a damp cloth and brush them if necessary before cooking them for about 5 minutes in a little salted water.
Drain them.
2. Wash the eggplant, remove the ends, pat it dry, and cut it into slices about 1 cm thick.
Lightly salt and let it drain for 15 minutes.
Rinse, pat dry, and then cut the slices into cubes.
3. Wash the leek and slice it.
Rinse the tomatoes, pat them dry, remove the stem, and cut the flesh into small cubes.
Grate the gouda cheese and set it aside.
4. Peel the onion and garlic. Chop them and sauté them in oil until golden.
Add the eggplant, leek, tomatoes, and chanterelles one after the other. Let it simmer for 3 minutes.
Add the vegetable broth and bring it to a boil. Let it cool slightly before incorporating the beaten eggs.
5. Transfer the mixture to a gratin dish and sprinkle with grated gouda cheese. Bake for about 25 minutes in a preheated oven at 180°C (160°C fan-forced).
Serve when golden brown.