Chocolate Candy

1/4 pound margarine
4 cups sugar
1 can evaporated milk
1 pinch salt
1 bag semisweet chocolate chips
10 1/2 ounce bag marshmallows
1 cup chopped nuts — optional

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Combine margarine, sugar, evaporated milk, and salt in a large saucepan. Bring to a boil over medium-high heat, and boil for 7 minutes at a rolling boil. Remove mixture from heat and stir in chocolate chips until smooth and melted. Add marshmallows and stir until melted. Stir in nuts, if desired. Pour mixture into a greased 13×9 baking pan. Cool completely. Store candy in the refrigerator.