Cut each zucchini in quarters lengthwise through the stem and then cut each quarter again in thirds lengthwise, making long skinny spears. In a medium shallow bowl, whisk together the pesto and 4 tablespoons of the olive oil and set aside. Place the parsley and garlic in the bowl of a food processor fitted with the steel blade and process until they are finely minced. Add the panko, Parmesan, red pepper flakes, 1 teaspoon kosher salt, and 1/2 teaspoon black pepper plus the remaining 4 tablespoons olive oil. Pulse only until all the panko is moistened with oil. Pour the mixture onto a dinner plate.