Combine the sugar, Meyer lemon zest, and grated ginger into a bowl. Rub the mix between your fingers to release the oils of the zest and the liquid of the ginger. The mixture will be like wet sand and very fragrant.
1 cup granulated sugar, 1 tablespoon fresh ginger, peeled and grated, 2 tablespoons Meyer lemon zest
Whisk in the eggs and egg yolks, and lemon juice.
7 large egg yolks, 2 large whole eggs, ⅔ cup Meyer lemon juice
Pour the mixture into a medium sauce pan, and place over a medium low heat. Add the butter. Stir continuously to keep the mixture moving so your eggs don't scramble.
6 tablespoon unsalted butter, room temperature
Cook the curd until thick and just beginning to bubble around the edges, or until an instant read thermometer reaches 170F. The curd will thicken as it cools.
Strain the curd into a clean shallow bowl, and let it sit until it reaches room temperature.
Pour the curd into the baked tart shell. Chill for at least 3-4 hours.
1 batch sweet tart dough recipe, fully baked