Preheat oven to 350.
Line the bottom of a 7 inch Spring Form pan with parchment paper and grease the paper and the pan.
In the stand mixer or large mixing bowl, add the oil, butter, sugar, water, powdered sugar, eggs, lemon juice, and lemon zest. and blend all together until smooth and creamy. If you want the yellow color to pop (and this is optional) add about 8 or 9 drops of yellow food coloring gel and mix well.
Now add the salt, baking soda, cream of tartar, and flour, mix until fully blended.
Press the crust/dough mixture into the bottom of the pan. Bake at 350 for about 10 minutes.
Remove from oven. Use the back of a spatula or bottom of a glass to gently press the crust down into the pan from where it puffed up from baking. Set aside.