Lemon Curd - cooking recipe

Ingredients

1 tablespoon finely grated lemon, zest of, plus
2 teaspoons finely grated lemons, zest of
1 cup fresh lemon juice
1 1/3 cups sugar
4 large eggs
3/4 cup unsalted butter, plus
2 tablespoons unsalted butter, cut into tablespoon pieces

Preparation

Whisk together zest, lemon juice, sugar, eggs and a pinch of salt in a 2 Quart heavy saucepan.
Add butter all at once and cook over moderately low heat, whisking constantly, until curd is thick enough to hold marks of whisk and first bubbles appear on surface, about 10 minutes.
Immediately pour curd through a fine sieve into a bowl, then chill, covered.