McDonald's Corp. will sell potato sandwiches at two vegetarian restaurants in India next year, the first such outlets for the world's biggest restaurant chain. The fast-food giant will open two locations in northern Indian cities that are pilgrimage sites for Hindus and Sikhs, according to Rajesh Kumar Maini, a spokesman for the company's North and East Indian operations. McDonald's already keeps beef and pork products off the menu in India, where a majority of the population are Hindus and Muslims.