Apology for the delay in the recipe. Original recipe is from Rabiah Amit but simplified a bit. Suggest to reduce sugar below to half as it is too sweet. So, here is the recipe:
(Makes 8½" square)
22 Egg Yolks
8 Egg Whites
15oz Castor Sugar13oz Hong Kong Flour
1 tbs Ovalette
4½oz Cold Water
5 tbs Condensed Milk
1. Place all Ingredient A in a bowl & beat high speed until white & thick.
2. In a separate bowl, beat ingredient B until white & fluffy.
Add into Ingredient A & mix well.
Divide into 3 portions & color each red, green & original.
3. Grill red portion layer by layer in 9"x9"x1" tin until finish.
Then Grill green portion layer by layer in a separate 9"x9"x1" tin until finish.
Once the cakes are cooled off, cut into ¾" width strip & then slice into triangle shape.
Arrange the green & red strips into pattern like the cake photo above & glue with jam.
Wrap the pattern blocks in plastic paper & freeze to stick them well.
4. Divide the original color batter into two parts.
Grill the first part in a 8½" square tin until finish.
Spread jam on top & arrange the pattern blocks.
Grill the remaining half of the original color batter layer by layer until finish.