Meatballs With Tomato Sauce

Name: Meatballs With Tomato Sauce
Ingredients: 12 ounces leftover roast beef, veal or pork, coarsely chopped; 3 tablespoons all-purpose flour; 1 teaspoon baking powder; 1 teaspoon salt; 1/2 cup minced onion; 1/4 cup minced celery; 1 garlic clove, minced; 1/4 teaspoon dried thyme; 1/4 teaspoon freshly ground black pepper; 3 large eggs, beaten; Vegetable oil, for frying; 1/4 cup vegetable oil; 3 garlic cloves, minced; 1/2 teaspoon dried thyme; 1/2 teaspoon dried oregano; One 28-ounce can diced tomatoes with their liquid; 1/3 cup pitted green olives, coarsely chopped; Salt and freshly ground pepper