Choco-Mint Freeze
["1 1/2 c. finely crushed vanilla wafers (28)", "1/4 c. melted margarine", "1 qt. peppermint stick ice cream, softened", "1/2 c. margarine", "2 sq. unsweetened chocolate", "3 egg yolks", "1 1/2 c. powdered sugar", "1/2 c. chopped pecans", "3 egg whites", "1 tsp. vanilla"]
["Mix finely crushed vanilla wafers with melted margarine. Reserve 1/4 cup for topping.", "Press remaining mixture into 9 x 9 x 2-inch pan."]
["vanilla wafers", "margarine", "peppermint stick ice cream", "margarine", "unsweetened chocolate", "egg yolks", "powdered sugar", "pecans", "egg whites", "vanilla"]