Greek Chicken Meatballs

Name: Greek Chicken Meatballs
Ingredients: For the meatballs:; Nonstick cooking spray; 3 garlic cloves, minced; 1 egg, lightly beaten; 1/3 cup minced white onion; 1/4 cup panko; 1 1/2 teaspoons dried oregano; 1 teaspoon dried mint; 1/2 teaspoon kosher salt; 1 pound ground chicken (I like a mix of white and dark meat for a moist meatball); Crumbled feta cheese, for garnish; Finely chopped English cucumber, for garnish; For the yogurt sauce:; 1 cup Greek yogurt; 2 tablespoons chopped fresh parsley; 1 tablespoon chopped fresh dill; 1/4 teaspoon ground black pepper