Preheat oven to 375 F.
Peel zucchini, cut lengthwise, scoop out the seeds and slice into chunks.
On a stovetop, cook zucchini over medium heat in a skillet for 10 minutes with 1/4 cup water. Add a little more water if it gets too dry. Drain.
In a small bowl, mix tartar, salt, flour, lemon juice, sugar, cinnamon and melted butter.
Pour over cooked zucchini and mix until incorporated.
Pour mixture into a 9-inch uncooked pie shell.
In a medium bowl, mix the topping ingredients by using a fork or pastry cutter to combine.
Add crumble mixture over the top of the zucchini.
Bake 45 minutes.