Process mint leaves until coarsely chopped. Add milk and process once. Place in a saucepan and bring to boil. Turn off heat. Chill 6 hours or overnight.Strain Beat egg yolks with sugar until lemon colored Meanwhile bring minted milk to boil. Pour boiling milk slowly into yolks beating in low. Transfer to saucepan and cook over very low heat until it coats a spoon ( about 4 to 5 minutes). Don't Let It Boil. Place pan in a large bowl with ice and water and stir until cold. Chill