Indian households should completely switch to olive oil as a cooking medium as its nutritional value is very high, it is rich in monounsaturated 'good' fats and, when used daily, can bring instant and easy wellness to a family's diet, celebrity chef and noted cookery expert Nita Mehta says. "Even though we have such a wide range of olive oils in our market, people don't seem to use them because of their mental block that the flavour of olive oil doesn't gel with Indian flavors," Mehta said at the launch here Satuday her latest book, "Indian Cooking With Olive Oil".