Peel and cut zucchini lengthwise, strip out seeds, cut in ½" slices. Cook in boiling water until tender.
Drain and cool cooked zucchini in cold water for 5 minutes.
Drain and add sugar, flour, salt, cinnamon, cream of tarter and lemon juice. Stir well
Add pineapple with the juice. Mix well, but do not beat.
Pour into a greased 9x13" baking dish.
Sprinkle cake mix over top and drizzle butter over dry cake mix.
Sprinkle on nuts as desired.
Bake at 350° for 60 minutes.