Keftedes: Greek Meatballs

Name: Keftedes: Greek Meatballs
Ingredients: 3 slices white bread with crust; 1 cup milk; 2 pounds ground beef; 1 yellow onion, minced; 4 cloves garlic, minced; 1/3 cup finely chopped oregano; 2 finely chopped tablespoons mint; 2 teaspoon white wine vinegar; 2 eggs beaten; 1/4 teaspoon grated nutmeg; 1/2 cup olive oil; Flour, for dusting; Salt and freshly ground black pepper; Pita Bread; Cucumber Yogurt Sauce, recipe follows; 2 cups plain yogurt; 1 cup seeded and small-diced cucumber; 3 cloves minced garlic; Salt