Onion Sambar or Ulliu Sambar is a very popular dish and is a favorite at home which goes well with idli, dosa and rice. Pearl onions or Shallots have a distinct taste and flavor of their own.Onion Sambar is a simple dish where flavors come from sambar powder, curry leaves and soaked tamarind. Onion Sambar dish falls into the category of comfort foods and dal is nutritious too.The only variation from the usual Sambar dish is the intrusion of pearl onions. Here is a well illustrated recipe for how to make Onion Sambar in Kerala style. Addition of fried coconut mixture enhances the spicy taste of Onion Sambar. The sight of round, shiny pearl onions floating on top of the curry can make anyone fall for the dish.