Preheat your oven to 180C and prep/line a loaf baking tin
In a bowl, combine flour, baking powder and salt - mix to combine well
In a separate bowl, combine sugar and lemon zest, mix until well combined
To the sugar and lemon mix, add yogurt, olive oil, eggs and vanilla, stir well
Combine the dry flour mix with the wet yogurt mix and stir just to combine
Drop in roughly 100g of the raspberries and give it a stir (leave the remaining 50g of raspberries to the side for now)
In the bowl, make small dollops of the raspberry jam and then use a knife or stirrer to swirl the jam through the mix
Pour the mix into your prepared baking tin and top with the remaining fresh raspberries
Bake in the oven for 45-50 minutes, checking for done-ness by inserting a skewer to check if it comes out clean. Allow to cool completely before slicing and serving