Cooking Steps

1. 

   Step1:Mix three yolks and 15 grams of sugar until the yolks turn white. Add 30 grams of milk and 30 grams of salad oil. Mix well. Add vanilla extract. Sift in 55 grams of low flour and 8 grams of corn starch, 1 / 4 teaspoon of baking powder and 1 / 8 teaspoon of salt. Mix well. Add 2 ml of lemon juice to 3 egg whites and mix until the yolks turn white. Add 50 grams of sugar three times in the middle. Preheat 160 degrees. Put the albumen paste into the yolk paste three times. Slice gently and mix well Pour in the baking tray covered with oil paper, gently knock off the bubbles, and scrape the surface flat; take out the upper and middle layers for 15 minutes; take out another oil paper and put it into the oven to coo

2. 

   Step2:Spread strawberry jam and roll it up. Wrap the plastic wrap and put it into the refrigerator to fix and slice.