Preheat the oven to 165°C (330°F), grease the pan and line with parchment paper.
In a small bowl, mix the sugar and grated lemon zest, and let sit together for about twenty minutes.
In a large bowl, beat the soft butter and sugar with lemon zest using a whisk or hand mixer. Add the oil and continue mixing.
Gradually add the eggs and whisk until all eggs are incorporated into the mixture. Add lemon juice and mix until smooth.
Add flour, baking powder, and salt, and continue to mix until a uniform batter forms.
Add milk and vanilla extract, mix until uniform. Add the poppy seeds and mix lightly.
Pour into the pan and bake for about 45 minutes until the cake is stable. Remove from the oven and let cool.
Fondant Glaze: Mix all the fondant ingredients and pour over the cake when it’s completely cool.
