Preheat the oven at 180°C and grease a 25 cm round baking tin.
With the mixer beat the eggs with the sugar until light and fluffy (the mix becomes white and frothy) , add the oil, then the flour, the yeast and the glass of milk.
Beat until smooth and finally add the poppy seeds and the grated zest.
Pour the batter into the tin and bake for about 25 min. until the cake is golden brown and a toothpick comes out mostly clean, with nothing sticking to it. Baking times may vary, so keep an eye on yours