Prepare the Zucchini Mixture: In a large bowl, combine grated zucchini, carrot, and potato. Add salt to the mixture and let it sit for about 10 minutes. Squeeze out the excess water from the vegetables to ensure your patties aren't too soggy.

To the drained vegetables, add minced garlic, grated cheese, egg, oatmeal, chopped parsley, paprika, Provencal herbs, black pepper, and mix well. If the mixture is too wet, add enough flour to form patties.

Form and Fry the Patties: Heat olive oil in a frying pan over medium heat.

Form the vegetable mixture into patties and fry until golden brown on both sides, approximately 4-5 minutes per side. Ensure they are cooked through and have a crispy exterior.

Make the Sauce: In a small bowl, mix Greek yogurt, mayonnaise, chopped olives, minced garlic, chopped parsley, a pinch of sugar, salt, and black pepper to taste. Combine well until the sauce is smooth.

Serve: Serve the zucchini patties hot, accompanied by the creamy sauce on the side.