Place the strawberries, sugar and water in a medium sized bowl. Microwave uncovered on high for 5 minutes. stir. Microwave for another 2 minutes. Cool. Add in the lemon juice and blend in a mixer to get your strawberry puree.
Preheat the oven to 180 C.
In a large mixing bowl, with a hand mixer whisk the eggs and sugar till almost double in size.
Add in the sifted flour, baking powder, lemon juice, strawberry puree, vanilla essence, salt, oil and the yogurt and whisk for 2-3 minutes till nicely blended.
Pour the batter into a prepared cake tin.
Take the strawberry crush and just spoon over the cake batter to form ribbons.
Bake in a preheated oven for 30-35 minutes or until a skewer inserted in the center comes out clean.