Start by washing your lemon, dry, and zest. It took 2 lemons to get the 2 tablespoons I needed.
Mix the granulated sugar and lemon zest together in a small bowl.
Add the egg yolks and whisk for about 30 seconds. Then add in the lemon juice and mix that to combine as well.
Move them to a medium-size heavy bottom saucepan.
Heat over low heat stirring constantly. Remember that this will burn quickly. So be sure to mix even in the corners of the pan.
Once this comes just barely to a boil and is thickened, remove from heat.
Add in the cubes of butter and mix until it is melted and well combined.
At this point, you can use it like it is, or you can strain if you want a really smooth curd. I personally like the zest in the curd, so I do not strain. This will be a personal choice though, strain if you like.
If you are not going to use it right away, make sure and cover the surface with plastic wrap. This will need to be right on top of the curd, otherwise, it will form a "skin" on the surface.
If you are not planning on using this right away, allow it to cool, then place in the fridge.
It will hold in the fridge for up to 2 weeks. Or, you can freeze it for up to 3 months in an airtight container.
Now, sit back and enjoy. You deserve it!