Beat egg yolks and sugar together until pale and well incorporated. Slowly add oil, then yogurt and vanilla extract. Sift in flour with baking soda and salt. Whip egg whites to soft peak and fold ...

Transfer to a wire rack to cool. Just before serving, make the affogato: Scoop 1 heaping scoop frozen yogurt into 4 small bowls. Pour 1 shot hot espresso into each bowl so it pools around scoop ...