Prepare the zucchini: Trim the courgettes and grate them using the wide edges of a grater. If the zucchini seem too tender, place them in a colander and press lightly to remove excess water.
Make bread crumbs: Cut homemade bread into cubes and blend until fine crumbs are obtained.
Combine ingredients: In the blender with the bread crumbs, add the egg, grated cheese, grated zucchini, chopped parsley, salt, and pepper. Pulse briefly to mix and knead everything together.
Shape meatballs: Grease your hands with olive oil and shape round meatballs weighing about 18 grams each.
Prepare for baking: Place the meatballs on a baking tray and sprinkle them with a drop of olive oil for browning.
Bake meatballs: Bake in a static oven preheated to 200°C (392°F). Cook on the middle shelf for 20 minutes, then move to the highest shelf for the last 8-10 minutes to brown the meatballs nicely.
Serve: Remove from oven and serve warm. Enjoy!