01 -
Trim and coarsely shred zucchini into a large bowl. Add 1 teaspoon salt; toss to coat. Let stand, stirring occasionally, for 10 minutes to draw out moisture.
02 -
Meanwhile, beat together egg, green onions, and pepper in another bowl. Transfer zucchini to a clean kitchen towel; squeeze to remove as much liquid as possible. Stir zucchini and flour into egg mixture until well combined.
03 -
Heat a griddle or extra-large cast-iron skillet over medium-high heat. Add oil; brush or swirl to coat pan. Drop mixture in 6 mounds onto the hot surface, then flatten slightly with a spatula. Cook, turning halfway through, until golden brown on both sides, 5 to 7 minutes.
04 -
Whisk sour cream, lemon zest, lemon juice, garlic, and remaining pinch of salt together in a small bowl until smooth.
05 -
Plate fritters and serve with lemony sour cream. Garnish with additional lemon zest and freshly ground black pepper.