Preheat oven to 325 degrees F (165 degrees C). Melt butter in an 8 inch square pan. Stir in graham cracker crumbs, 2 tablespoons sugar and 1/4 teaspoon cinnamon. Pat over bottom and onto sides of dish. Set aside.
In a blender, combine cottage cheese, milk, eggs, flour, lemon juice, vanilla, 2/3 cup sugar and 1/4 teaspoon salt. Blend until smooth. Pour into prepared crust.
Bake in the preheated oven for 60 minutes, or until filling is firm. Allow to cool completely.