Mix the egg yolks and the sugar. Use an electric mixer to beat until mixture is pale and creamy. Set aside.
In a medium saucepan place 1 cup of milk, the vanilla extract and vanilla paste. Let the mixture boil over medium heat.
When it starts boiling add 1/3 of this milk to the yolk and sugar mixture. Mix well.
Now pour egg and egg mixture in the pan with remaining milk. Keep stiring with a wooden spoon on low heat until the mixture thickens - do not let it boil. Remove from heat.
Add remaining 1 cup of milk and heavy cream. Mix well and let it cool. And then chill before running in ice cream maker.
Buttered Pecans
Melt butter in a small skillet.
Add pecans. Let it cook for about a minute and add brown sugar.
Mix well until all pecan pieces are covered with brown sugar. Remove from heat and place pecans in the fridge.
Place vanilla ice cream in the ice cream maker and work it according to manufacturer's instructions.
When ice cream is done add the pecans and mix well.
Put ice cream in the freezer for at least 2 hours. You could serve immediately if you prefer a softer ice cream.