For prepare tart : In a spice mixer,add sugar & grind coarsely.
In a bowl,add coarsely grind sugar,butter,egg white,vanilla essence & beat well.
In all-purpose flour,add salt & mix well.
Gradually add dry flour mixture and beat until crumbled.
Transfer the mixture to the clean working surface and knead until dough is formed.
Take small quantity of dough & make a ball.