Preheat the oven to 400°F (200°C) and line a baking sheet with parchment paper.
In a large mixing bowl, combine the ground turkey, breadcrumbs, chopped onion, minced garlic, egg, parsley, oregano, salt, black pepper, smoked paprika, and olive oil. Mix until just combined; do not overmix.
Form the mixture into meatballs, roughly 1 to 1.5 inches in diameter, and place them on the prepared baking sheet.
Bake the meatballs in the preheated oven for 18-20 minutes or until they are cooked through and golden brown.
While the meatballs are baking, prepare the Tzatziki. In a food processor, combine the Greek yogurt, grated cucumber, minced garlic, dill, olive oil, lemon juice, salt, and pepper. Whisk until smooth and well combined.
Serve the meatballs hot with a side of Tzatziki for dipping.
For added flavor, you can let the meatball mixture rest for 15 minutes before baking.
The Tzatziki can be made a few hours in advance and stored in the refrigerator for optimal taste.
Adjust the seasoning in the Tzatziki according to your taste preferences.