Line a rimmed baking sheet with parchment paper. Oil parchment. Preheat oven to 450°F.
Place cauliflower and potato in a food processor and run until finely chopped.
Place puree on a dishtowel, wrap in a bundle and squeeze out as much water content as possible.
Return contents to a bowl and add the eggs, cheese, flour, salt and pepper. Mix thoroughly.
Dump the cauliflower mixture onto the baking sheet and form a 9” x 12” crust. Pat down to create a flat surface about ¼-inch thick.
Bake for 10 minutes or until browned on the edges, then convert oven to broiler function and broil for approximately 3 minutes, or until top is nicely browned.