Combine orange juice and raisins; let stand overnight. Beat butter and sugar until fluffy. Beat in egg and orange peel. Combine flour and baking soda; stir into butter mixture. Add raisins, any soaking liquid and oats; mix well. Drop dough by rounded teaspoonfuls onto greased baking sheets, spacing 5 cm apart; flatten slightly. Bake at 180ºC F oven 10-12 minutes. Cool completely. In small, deep bowl, microwave chocolate and oil 3 to 4 minutes on LOW power, stirring once. Let stand 2 minutes; stir until smooth. Dip one-third of cookie; chill on waxed paper-lined baking sheets until chocolate is firm. Makes about 3 dozen.