In a bowl mix yoghurt and baking soda and let them react.

In another bowl mix sugar and oil and beat till they are a even mix and add vanilla and mix again.

Put the oven for preheat at 180 degrees for 10 mins and grease and dust a baking tin too and keep it ready

Sieve whole wheat flour with salt and baking powder , four times.

Now mix yoghurt mix and sugar-oil mix together in a uniform mixture.

Gradually with 2 tbsp at a time gently fold the flour into the wet mixture. Don't over mix just fold so it all mixes evenly.

Now add the jam/crush and mix milk and lemon juice and add add into this batter folding it one last time.

Pour the batter into the center of the baking tin and tap it to remove any bubbles and spread it evenly.

Bake it for straight 40 min and then do a toothpick test at the middle if needed bake for another 5 mins, so total 45 mins. Let it sit in the oven for good 10 mins and then take it out and cool it. If you want refrigerate it and then slice it and serve.