8 blood oranges (or combination of blood and navel oranges)
1 Tbs. grated blood orange peel
2 large egg yolks
1/3 C. fresh blood orange juice
1-1/2 C. sugar
1/3 C. fresh lemon juice
6 large eggs
1/2 C. unsalted butter, cut into 8 pieces, room temp
Whisk sugar, orange juice, lemon juice, eggs, egg yolks, and orange peel in medium metal bowl to blend. Add butter; set bowl over saucepan of simmering water and whisk constantly until curd thickens and instant-read thermometer inserted into curd registers 175 degrees F, about 12 minutes (do not boil). Remove bowl from over water. Press plastic wrap directly onto surface of curd; chill at least 1 day and up to 3 days.