Puree the grapes in a mixer. Add 100 gm. sugar and heat till it thickens to the right consistency. Cool it completely or till luke warm
Add the milk powder and keep aside
For the Cake:
Beat the egg whites. Add vanilla essence and lemon juice and lemon rind and beat again.
Keep aside. In another bowl, beat the butter and sugar till creamy.
Do sieve the sugar well to avoid lumps. Now, add the 3 egg yolks and beat well till nicely blended.
Now, Sieve together flour, baking powder, baking soda and almond flour into the butter and sugar mixture. Mix well with a spatula.
Add this stage divide the batter into half. Now add half the batter into the grape compote mix and the to the rest we will add ¼ cup warm milk and flour dusted cranberries.
At this stage you have two batters: 1- Purple grape batter.2- Yellow vanilla cranberries batter.
Grease a Bundt pan with butter and pour the grapes batter first. Tap on the shelf to settle evenly. Now pour the vanilla cranberry batter on top. Spread evenly with the spatula. Tap again to settle any air bubbles.
Bake this in a preheated oven @ 180 degrees c for about 40 minutes or till done. Please follow your oven temperatures for time.
Let it cool completely before unmolding and serving.