Combine cereal and walnuts in greased 13 X 9 X 2" pan.
Combine butter, sugar, milk, salt and dates. Cook to the soft ball stage (240°); stir occasionally. Remove from heat; add vanilla and lemon juice.
Pour hot syrup over cereal mix-hire and stir lightly to coat cereal. Spread mixture evenly in pan. Sprinkle coconut over top and press mixture firmly int