Combine ground turkey, wild rice, 1/4 cup beef broth, egg, leeks, garlic, salt and pepper in large bowl. Shape turkey mixture into 1-inch balls. Heat oil in large skillet over medium-high heat. Brown meatballs; move to side of pan. Add remaining beef broth, tomato paste, mushrooms with liquid, bell pepper, olives, onion, parsley and oregano to skillet; stir to blend. Stir sauce and meatballs together. Simmer, covered, about 30 minutes or until sauce is thickened, vegetables are tender and meatballs are cooked through. Serve meatballs over spaghetti.
Variation
Make smaller meatballs and serve as an appetizer.