For the best flavor, use high-quality mozzarella and Parmesan-Reggiano. Handle the zucchini blossoms with care, as they are delicate. Ensure the oil is at the correct temperature for optimal crispness. Too low, and the blossoms will be greasy; too high, and they will burn. If you don't have sweet rice flour, you can substitute it with an equal amount of regular rice flour mixed with 1/2 teaspoon of cornstarch. These are best served immediately while they are still hot and crispy. Garnish with fresh herbs like basil or mint for an extra touch of flavor and visual appeal.