Oregon Hazelnut Praline Ice Cream

Praline: 

       2 tablespoons butter 
       4 tablespoons sugar 
       1/2 cup crushed Oregon hazelnuts 
       pinch of salt 
       1/2 gallon heavy cream 
       2 cups sugar 
       2 tablespoons vanilla extract 

Melt the butter, carmelize sugar and stir in nuts. Cool the praline overnight on
parchment. Prepare the cream, sugar and extract in ice cream machine and
stir in the praline before final cure.