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["Melt butter in saucepan; stir in coconut and remove from heat.", "Press mixture against sides and bottom of a 9"" pie plate; refrigerate.", "Combine gelatin, 1 cup of the sugar, salt, water and chocolate in saucepan.", "Place over low heat until chocolate melts and sugar dissolves; remove from heat.", "Beat yolks slightly in medium bowl.", "Stir a little of the hot chocolate mixture into the yolks; return all to saucepan.", "Heat, stirring occasionally, just until boiling.", "Transfer to a bowl; cool rapidly over ice water, stirring occasionally until mixture mounds.", "Add vanilla extract.", "Beat whites and cream of tartar in a large bowl until foamy.", "Gradually beat in remaining one cup sugar until meringue forms stiff, glossy peaks; do not underbeat.", "Fold meringue into chocolate mixture; chill briefly.", "Mound into coconut shell and refrigerate until firm, at least four hours.", "Garnish as desired."]