Preheat the oven to 170°C/340°F (fan forced). Line a 23cm x 13cm loaf tin with baking paper.
In a food processor or mixing bowl beat the eggs, yoghurt, oil, sweetener, vanilla, lemon juice and zest and vanilla until well combined. If using a Thermomix, 30 seconds speed 3.
Add the baking powder and soda and sea salt and mix for 5 seconds to just combine. For the Thermomix 5 seconds, speed 4.
Fold in the flour until just combined. Don't over mix it, just combine gently. For the Thermomix lid locked flour symbol for 2 rotations. Then gently fold in three quarters of the blueberries.
Pour into your lined baking tin, top with the remaining berries and bake for 45 minutes or until firm in the centre.