Preheat oven to 325°F. Lightly grease a 9-inch springform pan
In a medium bowl, whisk together all dry ingredients. In a large bowl, beat eggs and sugar until pale and thick. Add lemon zest and yogurt and blend to combine. Whisk in the olive oil in a slow and steady stream. Slowly add flour mixture until just blended. Pour into pan and bake for 40 minutes until golden brown. When cooled, dust with sugar.