Preheat the oven to 160 degrees Celsius (325 Fahrenheit) with heat up and down.
Prepare a loaf pan cake mold, loaf type about 26x11cm (8.5 x 4.5-inch) with baking spray or butter and/or parchment paper.
Mix the dry ingredients except the sugar (flour, yeast, lemon zest, salt) in a bowl and set aside.
In another bowl, mix the eggs and the sugar with a whisk until you get a very creamy texture. Now add the heavy cream and continue whisking.
Now melt the butter in a saucepan or in the microwave in 15 second intervals and mix it with the poppy seeds and a lemon juice teaspoon .
Add the dry ingredients to the egg and sugar mixture, sifting them if possible to avoid lumps, and mix with a spatula.
Finally, add the poppy seeds with butter and lemon to the mixture and mix well.
Place the lemon cake dough with poppy seeds in the baking pan that we have previously prepared.
Bake for 40-45 minutes and enjoy!