For the tagliatelle and finishing the dish

• 500 gr. tagliatelle
• 60 gr. olive oil
• 350 gr. onion, minced
• 80 gr. prosciutto, small dice
• 400 gr. sautéed mushrooms
• 120 gr. white wine
• 800 gr. mushroom or chicken stock
• 120 gr. cold butter
• 120 gr. parmesan, grated
• 10 gr. fresh thyme, finely chopped
• 10 gr. chives, finely chopped
• 10 gr. white truffle oil
• salt

For the sautéed mushrooms

• 500 gr. button mushrooms, quartered
• 200 gr. sunflower oil
• salt