Heat 1/2 tablespoon oil in a large pot over medium heat. Add onion and sauté for 6 minutes or until softened. Add garlic, ginger, curry powder and red pepper flakes, and cook for 1 more minute. Stir in sweet potatoes, chicken broth and tomatoes, and bring soup to a boil. Simmer, covered, 10 minutes.
In a large skillet, heat the remaining 1/2 tablespoon oil. Add the turkey and cook, breaking up any clumps with the back of a spoon for 5 minutes or until the turkey is cooked through. Season with 1/2 teaspoon salt and 1/4 teaspoon black pepper. Drain on paper towels.
Whisk in the peanut butter and coconut milk. Add cooked ground turkey, the remaining 1/2 teaspoon salt and brown sugar to the soup, stirring to combine. Bring mixture to a simmer and cook for 20 minutes. Garnish with cilantro and peanuts, if desired.
Nutrition information per serving:
Calories410Fat23 gSodium1,070 mgSaturated fat6 g
Carbohydrates31 gCalcium106 mg