The frangipane filling is not so sweet, but I prefer maintaining the sugar intake rather low. If you have a picky sweet-tooth, increase a bit its amount.
Ps : the third day it tastes even better than the first! —Valentina | The Blue Bride
In a high-speed blender, grind rolled oats to flour, put it in a bowl with all other ingredients and mix until a smooth smooth dough is obtained.
Roll and use it to cover the bottom and the sides of a tart pan – mine was rectangular, 13.5” length – and set aside.
Preheat oven at 350°F / 180°C.
for the fillings
In a high-speed blender or a food processor add almonds, arrowroot, coconut sugar and baking powder and process until a rough flour is obtained.
Pour the mixture in a mixing bowl, add grated lemon zest, vanilla, oil and yogurt and stir with a whip.
Pour the batter on the crust, plunge raspberries into it and bake for 30-40 minutes, checking color and smell of your tart – I discovered my mum’s oven really burns everything, so I have to be extra careful. The tart is ready when the crust starts to golden and the surface of the filling is no more soft.
For an extra treat, serve warm with some ice-cream!