Follow these detailed steps carefully to ensure your fritters are perfectly crispy, never soggy, and packed with flavor. The secret truly lies in the preparation of the vegetables.

1. Prepare the Vegetables: Start by washing and trimming the ends of the zucchini and carrots. Using the large holes of a box grater, shred the zucchini and the carrots into a large mixing bowl.
2. The Crucial Squeeze: This is the most important step for crispy fritters. Sprinkle about a teaspoon of salt over the shredded vegetables and toss to combine. Let the bowl sit for 10-15 minutes. You will see a significant amount of water begin to pool at the bottom of the bowl as the salt draws out the moisture.
3. Squeeze Again (and Again!): Transfer the salted vegetables to the center of a clean kitchen towel, cheesecloth, or a few layers of heavy-duty paper towels. Gather the corners of the towel and twist it tightly over the sink, squeezing out as much liquid as humanly possible. You’ll be amazed at how much water comes out. The goal is to get the vegetable shreds as dry as you can.
4. Combine the Batter: Place the squeezed, dry vegetable shreds back into your now-dry large mixing bowl. Add the lightly beaten eggs, all-purpose flour, grated Parmesan cheese, finely chopped green onions, minced garlic, and freshly ground black pepper.
5. Mix Thoroughly: Using a spatula or your hands, mix all the ingredients together until they are just combined. Be careful not to overmix. The mixture should resemble a thick, textured batter. If it seems overly wet, you can add another tablespoon of flour, but this shouldn’t be necessary if you squeezed the vegetables thoroughly.
6. Heat the Pan: Place a large non-stick or cast-iron skillet over medium heat. Add about 2 tablespoons of oil to the pan. You want enough oil to generously coat the bottom. Allow the oil to heat up until it shimmers. To test if it’s ready, you can drop a tiny bit of batter into the pan; if it sizzles immediately, you’re ready to go.
7. Form and Fry the Fritters: Scoop heaping tablespoons of the batter and gently drop them into the hot pan. Use the back of the spoon to flatten each mound into a patty, about 2-3 inches in diameter and about ½ inch thick. Don’t overcrowd the pan; cook the fritters in batches of 4-5 at a time to maintain the oil temperature and ensure even cooking.
8. Cook to Golden Perfection: Fry the fritters for about 3-4 minutes on the first side, or until the bottom is deeply golden-brown and the edges are crispy. Carefully flip them using a thin spatula.
9. Finish Cooking: Cook for another 3-4 minutes on the second side, until it’s also golden-brown and the fritter is cooked through.
10. Drain and Serve: As each batch is cooked, transfer the fritters to a wire rack or a plate lined with paper towels to drain any excess oil. This helps them stay crispy. Repeat the process with the remaining batter, adding more oil to the skillet as needed between batches. Serve immediately while warm.