*Curry powder is a blend of spices, and taste varies from brand to brand. Start with 1/2 teaspoon curry powder for a mildly flavored dish, then adjust to taste; 1-1/2 teaspoons will make a hot dish.
Heat oil in very large skillet over medium-high heat. Add onion, garlic and gingerroot. Cook and stir 5 minutes or until onion is translucent. Stir in flour. Add chicken broth and scrape up browned bits. Bring to a boil. Reduce heat; cook and stire 2 minutes or until thickened. Add diced tomatoes, curry, salt and pepper. Simmer 5 minutes. Add turkey; simmer 5 to 10 minutes longer. Stir in lemon juice. Serve over rice.