Preheat oven to 180C. Combine almond meal (260g), raw sugar (220g), raw sugar (220g), butter (120g) and 1 tsp salt in a bowl, then rub with fingertips until coarse crumbs form.
Spoon half the mixture into a lightly buttered and baking paper-lined 26cm-diameter springform pan, gently pressing to evenly cover base.
Add eggs (2), yoghurt (250g) and nutmeg (1 tbsp) to remaining crumble mixture and beat with a wooden spoon until smooth and creamy.
Pour over prepared base, smooth top, scatter pistachios (45g) around edge and bake until golden—35-45 minutes.
Cool completely in pan on a wire rack to room temperature, then serve with extra yoghurt. The cake will keep in an airtight container for up to a week.