Directions: In a medium bowl, combine the zucchini, onion, eggs, flour and salt. In a large skillet over medium-high heat, heat the oil until hot. Place large spoonfuls of the zucchini mixture into the oil, while pressing down with a wooden spoon to form thick patties. Brown on one side, turn and flip brown on the other. Let drain on paper towels. Serve hot with a dollop of plain nonfat Greek yogurt.