In a small saucepan, melt chocolate chips with water; stir until smooth. Stir a small amount of melted chocolate mixture into egg yolks; return all to pan, stirring constantly. Cook, and stir 2 minutes or until slightly thickened.
Remove from heat; stir in 3 teaspoons vanilla extract. Quickly transfer to a medium bowl. Stir occasionally until completely cooled.
In a medium bowl, beat 1 ½ cups whipping cream until it begins to thicken. Add 3 tablespoons sugar; beat until soft peaks form. Fold into cooled chocolate mixture.
Cover and refrigerate at least 2 hours.
Place mixing bowl and mixer whisk attachment into freezer 20 minutes to chill
Pour 1 cup heavy whipping cream, 2 tablespoons sugar and ½ teaspoon vanilla extract into cold mixing bowl. Whisk on high speed until medium to stiff peaks form, about 1 minute. Do not over beat.
Top each serving with whipped cream.