I pour a part of oil into the cup and grease the edges well.
I pour sugar, flour and yeast into the cup and mix them together with a teaspoon.

I add the egg and whisk with the spoon, I also add the milk and the remaining part of the oil.
Always mix everything with a spoon, obtaining a smooth cream.

I add the grated lemon peel.
I mix and bake at 900 W for a minute and a half (you can do the toothpick test!)

Once taken out of the oven, I let the cake rest for a couple of minutes. With the spout of a piping bag, I make a hole in the surface by pushing and turning the spout. Remove the "cap" and fill the hole with jam.