Start by finely grating the zucchini and carrots, then transfer them to a clean towel and squeeze out the excess moisture. Finely dice the onion and add it to a large mixing bowl along with the grated vegetables.
Pour in the beaten eggs and sprinkle the flour, chopped parsley, salt, and paprika over the vegetables. Gently fold everything together until the mixture is well combined and slightly sticky.
Heat a few tablespoons of neutral oil in a frying pan over medium heat until shimmering and bubbling lightly. Using a spoon or your hands, scoop about 2 tablespoons of batter and gently form it into a flat patty in the pan.
Cook the fritters for about 3-4 minutes on each side, watching for a golden-brown crust to develop and listening for a gentle sizzling sound. Carefully flip them with a spatula to cook evenly on both sides.
Once the fritters are crisp and golden, transfer them to a paper towel-lined plate to drain excess oil. Repeat with the remaining batter, adding more oil to the pan as needed.
Serve the vegetable fritters hot, garnished with fresh herbs or a squeeze of lemon for extra brightness. Enjoy their crispy edges and tender insides as a satisfying snack or light meal.