To make eggless lemon cream, start by grating the zest of the lemons after washing and drying them. Try to avoid grating the white part, which is the most bitter.
Pour the milk into a saucepan with a thick bottom and add the lemon zest. Heat it over medium-low heat until it is about to boil. Meanwhile, take a bowl and sift the cornstarch and sugar into it. Mix well.
When the milk is about to boil, pour it into the bowl and quickly whisk it with a hand whisk to dissolve the sugar and combine the cornstarch without creating lumps. Then, put the saucepan back on the heat.
Cook over low heat, stirring continuously with a wooden spoon, until the cream thickens without burning or sticking to the bottom of the saucepan. Check the density by observing if it drips or remains attached to the spoon.
When the cream reaches the right thickness, transfer it to a cold bowl and immediately cover it with plastic wrap in contact with the surface to prevent a skin from forming as it cools.
Once the eggless lemon cream has cooled down, it is ready to be used!