Preheat oven to 350°F (175°C). Mix 1 ½ cups flour, the cold butter, and ¼ cup sugar into coarse crumbs, then press into a 9-inch pie plate.

Blend the cottage cheese, ¾ cup sugar, eggs, 3 tbsp flour, vanilla, and salt until completely smooth.

Pour the filling into the crust and place the pie on a baking sheet.

Bake for 50 to 55 minutes until the edges are golden and the center is set with a slight jiggle, then cool in the oven with the door cracked for 10 minutes.

Cool completely on a wire rack, about 2 hours, then slice and serve chilled or at room temperature.