Preheat the oven to 425°F. Line a baking sheet with parchment paper.
Add the cottage cheese to the bowl of a food processor or blender and blend until smooth. Transfer the cottage cheese to a medium bowl then stir in the flour, baking powder and 1/4 teaspoon kosher salt. Mix just until combined. (The dough will be shaggy.)
Lightly flour your work surface then turn out the dough and knead it 5 or 6 times just until smooth. Using a rolling pin, roll it out until the crust is about 11 inches in diameter and about 1/2-inch-thick. Transfer the crust to the baking sheet and brush it lightly with the olive oil then bake it for 8 minutes.
Remove the crust from the oven then spread on the marinara sauce, leaving a 1/2-inch border around the edges. Sprinkle on the cheese, plus any toppings, then return the pizza to the oven and bake until the edges are golden brown, an additional 8 to 10 minutes. (See Kelly's Note)
Remove the pizza from the oven and let it cool slightly before slicing and serving.