Separate yolks and whites. Add salt to the yolks and mix. Add 50gm sugar and mix until foamy (paste like)

Mix 5 egg whites until foamy. Add 70 gm sugar in 3 times and mix

Mix the yolk mixture to the whites mixture using a spatula. Add the flour and baking powder and mix

In a separate bowl, add milk and oil. Into the mixture, add some batter and mix then return to the remaining batter and mix.

Place a lining paper to a rectangular baking tin. Spread the batter and using a scraper, even out the batter. Hit the tin to remove excess bubbles then place in a preheated oven at 170°c for 30 mins.

Once ready, turn it around so that the lining paper is on top and remove the paper. Cut the edges to remove rough ends

Using a knife, cut one end diagonally about 3mm,then cut 3mm deep and 2cm width across making sure that you don't cut completely.just halfway.

Apply your favourite jam(I used strawberry jam). Then carefully lift the lining paper while rolling to make a big roll. At the end, seal the two sides of the lining paper tight with a cellotape then keep it for 1hour in the fridge to firm it

Enjoy