Banana Oat Bars

3/4 cup soft butter                                              1 1/2 cups mashed ripe bananas
1 cup dark brown sugar                                       4 cups oatmeal
1 egg                                                                 1 cup raisins
1/2 tsp. salt                                                        1/2 cup chopped walnuts

In large bowl, cream butter and sugar, beat in egg, salt and bananas. Stir in remaining ingredients. Turn into greased pan and bake at 350* for 1 hour.