In bowl, mix turkey and chili powder, 1/2 tsp. salt and 1/4 tsp. pepper; shape into twelve 1-inch meatballs. In large pot, bring next 7 ingredients to simmer over medium-low. Add meatballs and simmer 15 minutes. Add scallions and cilantro. Simmer 10 minutes; season. Serve with lime wedges.
