Trata Piato with Tzatziki

Name: Trata Piato with Tzatziki
Ingredients: 1 English cucumber (peeled, seeded, and finely diced or shredded on box grater); 2 cloves garlic, minced; 2 tablespoons extra-virgin olive oil, plus more for garnish; 1 teaspoon sea salt; 1 teaspoon dried mint or (fresh optional); Pinch white pepper; 2 cups Greek yogurt (recommended: Fage or any other similar thick yogurt); Canola oil, for frying; 2 Holland eggplants (smaller is more tender), sliced into thin rounds; 2 green zucchini, (smaller is more tender), sliced into thin rounds; 2 cups all-purpose flour, for dredging; 2 cups cold water; 1/2 teaspoon sea salt; 1 teaspoon dried Greek oregano