Combine sugar, 1½ c. water and salt in saucepan; heat to boiling.
Mix cornstarch and ⅓ c. water to make smooth paste; add to boiling mixture gradually, stirring constantly; cook until thick and clear. Remove from heat.
Combine egg yolks and lemon juice; stir into thickened mixture. Return to heat and cook, stirring constantly, until mixture bubbles agai