Cut the eggplant lengthwise and carefully remove the pulp from the two halves with a spoon. Sprinkle the preparation with salt.
Heat a frying pan with vegetable oil and fry the celery, onion, eggplant pulp and mushrooms until soft. Season the vegetables to taste.
Place fried vegetables, sausages and cheese on top of the eggplant boats. Bake at 200°C in the oven for 10-15 minutes.