Mix the flour, salt, and pepper in a large bowl. Stir in the 3/4 cup water, onion, and garlic. If dough is too crumbly, add a little more water. Dough should form a compact ball.
On a lightly floured surface roll out dough until it is 1/4″ thick. Use cookie cutters to cut out shapes (fish shape is traditional).
Pour oil into a skillet 2-3″ deep. Heat oil until it reaches 350 degrees on a deep-frying thermometer. Fry fritters for 3-4 minutes, turning them frequently until they puff slightly and are golden brown on both sides. Transfer to a towel to drain.