Grate the zucchinis and place them in a clean kitchen towel to remove excess moisture.
In a mixing bowl, combine the grated zucchini and salt. Let it sit for 10 minutes.
Squeeze the zucchinis in the towel to extract more moisture.
Add the flour, Parmesan cheese, egg, green onions, black pepper, and garlic powder to the bowl.
Mix until well combined, creating a thick batter.
Heat a skillet over medium heat and add olive oil.
Spoon the batter into the skillet, forming small patties.
Cook for 3-4 minutes on each side until golden brown and crispy.
Remove fritters and place them on paper towels to absorb excess oil.
Serve warm with a dollop of sour cream or yogurt on top.