Russian Shuba Salad (Fur Coat)

• 1/2 purple onion, salt, sugar (honey), vinegar 
• 1 eggplant (or 300g of mushrooms), oil for frying it, soy sauce 2-3 table spoons
• Nori seaweed - 3 sheets

cooked vegetables:

• Potatoes - 3 
• carrots - 3 
• beets - 2 
• Home-made mayonnaise - about 100g