Preheat the oven to 180°C (160°C fan).
Place the almond meal, both sugars, buckwheat flour, butter and salt into a food processor. Blitz until the mixture resembles coarse breadcrumbs.
Transfer about two-thirds of the crumb mixture (approx. 400 g) to a large bowl. Add the yoghurt, eggs, vanilla and nutmeg. Stir gently until just combined.
To bake as individual cakes
(Greased silicone mini loaf tins or muffin tin – makes approx. 10)
Divide the remaining crumb mixture evenly between the moulds and press down firmly to form a base. Spoon the batter evenly over the top.
Bake for 25–30 minutes, or until just set and lightly golden. Allow to cool slightly before removing from the tins.
To bake as one cake
(Greased and lined 23 cm round tin)
Press the remaining crumb mixture firmly over the base of the tin. Spoon the batter on top and smooth gently.
Bake for 45–50 minutes, covering loosely with foil for the final 10 minutes if the top is colouring too quickly. The cake should feel just set in the centre.
Dust with icing sugar and finish with cream, nuts or pomegranate if you like.
Lovely served slightly warm or at room temperature.