Step 1: Grate the rinsed zucchini and put the mixture on a sieve placed over a large bowl. Season with salt.
Step 2: To extract all excess liquid, place a weight on the grated zucchini pieces.
Step 3: After half an hour, squeeze the mixture and remove from the sieve. Mix the zucchini pulp together with ricotta cheese, grated Parmesan, egg and the breadcrumbs.
Check the taste, and if necessary, add salt and pepper. If the mixture is not firm enough, add more breadcrumbs.
Step 4: Roll the zucchini mixture into balls (diameter ca. 4 cm/1.5 inch) and dust them well with flour.
Step 5: Fry the balls in a saucepan over a medium heat for about 5 minutes until they are golden. Turn occasionally.
Step 6: Remove all excess oil by placing the fried zucchini balls over a paper towel. Serve immediately with e.g. lettuce and sliced tomato.