Combine chocolate pieces condensed milk and salt. Cook on low heat, stirring often until all, chocolate is completely melted. Add vanilla.
In a two-cup glass measuring cup, melt caramels in microwave with milk and margarine. Add to chocolate mixture and stir well. Add nuts. Stir well. Pour into foil lined 7 x 11 inch pan. Cool in refrigerator overnight. Turn onto cutting board. Peel off foil, cut into squares.
Cajun Country -- New Iberia, Louisiana