Place the grated zucchini and salt in a bowl and set aside for 10 minutes.
Scoop out a handful of zucchini and squeeze out the liquid.
Add the pepper, grated onion, breadcrumbs, cheese, and eggs. Mix well.
Shape the zucchini mixture into patties.
In a frying pan, heat up enough oil for frying. Fry each side of the patty until brown before flipping over to the other side.
Serve warm and top with sour cream sauce and lemon.