Place 2 tbsp. of granulated sugar in each llanera or mold. Set the llanera on the stovetop over low heat to dissolve the sugar. Once the sugar completely dissolves, hold the llanera using a tong to tilt and distribute the caramel at the bottom of the mold. Cover with aluminum foil and set aside to let it completely cool down.
Prepare the steamer. Add water and bring to a boil. While waiting for the water to boil start with the custard mix.
In a bowl add egg yolks then beat with a wire whisk until all of the yolks are broken then add the condense milk , lemon rind, vanilla sugar and evaporated milk then mix well. Don’t over mix to avoid forming bubbles.
Using a cheese cloth or fine mesh strainer, strain the custard mixture into another bowl to remove bubbles. Pour the custard mix into llanera with caramel (about 1 3/4 cups) each mixture. Cover with aluminum foil to avoid water dripping from the steam. Let it sit for 5 mins to rest before steaming.
When water is boiling, turn the heat to low. Arrange your llanera or molds in the steamer and steam for 1 hour or when inserted tooth pick comes out clean.
If the middle of the flan is still uncooked turn off the heat and let the leche flan cook in the steamer for 5 to 10 minutes more. Removed the llanera from steamer and let it cool complete and refrigerate for best result. Bon appetit!