Beat yolks with sugar for 30 minutes, then beat in lemon juice and skin.
Beat egg whites until stiff
Fold in flour into yolks, then fold in egg whites slowly, until combined
Lay parchment paper on jelly roll pan and spread batter evenly
Preheat oven to 350 F and bake cake for 12-15 minutes
Take pan out of oven, turn it upside down on a clean parchment paper or towel
Peel the old parchment paper, spread jam, roll slowly and leave it until cooled to room temperature