In mixing bowl, beat margarine and sugar until fluffy texture. Add eggs, lemon rind, and vanilla; beat until combined. In another bowl, add flour, baking powder, and salt; stir to combine. Beat flour mixture into creamed mixture alternately with milk. Fold in berries. Drop dough by teaspoonfuls onto greased cookie sheet. Bake at 375° for 10-12 minutes. Transfer cookies to wire rack to cool. Makes about 2 1/2 dozen.