Isabelle's Lemon Yoghurt Cake - Gateau au Yaourt -

Ingredients:

• ½ of a standard 11 gram envelope of baking powder (not baking soda) (levure chimique); this is ½ US tablespoon.
• 200 ml = 1 cup = 250 gram plain yoghurt
• 100 ml = ½ cup vegetable oil
• 400 ml = 2 cups of fine granulated sugar
• 300 ml = 3 cups = 400 gram all-purpose flour (not self-rising!)
• 2 eggs, lightly beaten
• zest of 1 large (untreated) lemon, or of 2 medium lemons
• pinch of salt

Instructions: