Drain pineapple tidbits and one can of crushed pineapples and put into a 9 x 13 baking dish.
Pour lemon & zest over pineapple.
Mix dry ingredients together and hand sprinkle 3/4 of it over pineapple.
Drain last can of crushed pineapple and spread over dry ingredients.
Sprinkle remaining dry ingredients over pineapple.
Sprinkle with pecans and cinnamon.
Dot with margarine all over the top, about every 2".