Peel onion, cut in half and thinly slice.
Heat 2" of oil in heavy saucepan or wok until about 375.
Meanwhile, mix remaining ingredients, except water, in large
bowl and mix well. Stir in water to make a medium-thin batter,
Add onions and mix till they are covered with batter.
Carefully, using your hand, place about 1/3 C of onion mixture
in hot oil. Repeat until you have several fritters in pan, being
careful not to overcrowd. Cook until golden brown on first side
then flip and cook until golden on second side.Remove from
oil and drain on paper.
Serve hot with green chutney or ketchup.
Place all ingredients in blender and blend until smooth. Check
for seasoning, adding salt lime juice and chili as needed.