Which of the following food items is prepared using plant products only?

Ghee is obtained by processing of milk and milk is an animal product. Idli is made by using rice, urad dal, salt and water. Rice and urad dal are the products obtained from plants. Kheer requires milk, which is again an animal product. Chicken curry is made from chicken, which is also an animal source. Thus, it is idli only, which is prepared by using plant products.