Write the next sentence in the following story.

How to make a lemon cheesecake
Prepare the lemon curd.
Using a heavy 2 quart saucepan, stir the lemon zest, juice, sugar and eggs with a whisk.
Cook the butter over heat that's moderately low.

OPT:
-- When the butter melts, add lemon zest and stir to prevent it from burning. Leave to rest for 10 minutes so the butter has time to soften.;
-- Cook until the curd and sugar dissolves, which should take approximately 40 minutes. Once the mixture turns pale and is soft, remove the pan from the stove and set it aside while you continue to whisk in the butter and sugar.;
-- Frequently whisk it, until the lemon curd is thick enough for marks to appear and the first bubbles come up on the surface (an estimate of about 6 min. ) Pour the curd through a fine-mesh sieve into a wide shallow dish.;
-- Allow it to melt in the butter for a minute. Pour the cream cheese, dry whisking over the lemon curd.;. The answer should be
Frequently whisk it, until the lemon curd is thick enough for marks to appear and the first bubbles come up on the surface (an estimate of about 6 min. ) Pour the curd through a fine-mesh sieve into a wide shallow dish.