India, Oct. 24 -- If you are buying online, check your truffle seller is providing you with fresh product. What you should be looking for, how much to prepare per person plus a straightforward dish to enjoy right away. Berlin (dpa) - More and more people are acquiring a taste for truffles. But how should they be used and how much do you need? "If you're using real truffles, allow about 10 grams per person," says Nikolai Wojtko from the Ahrtruffel association, a truffle group based in western Germany. He says they are usually sold already cleaned and ready to use. But if you still want to peel your truffles, don't throw away the skins. "You can soak them in olive oil for a few days to make aromatic truffle oil," he says. Keep meals using tru...