Slow Cooker Creamy Chicken Mint Curry

Name: Slow-Cooker Creamy Chicken & Mint Curry
Ingredients: 4 teaspoons extra-virgin olive oil; 1 red onion, very finely diced; 1 tablespoon fresh ginger, grated; 4 garlic cloves, pressed; 1/2 teaspoon ground cumin; 1/2 teaspoon ground coriander; 1 teaspoon salt; 1 teaspoon sugar; 1 large tomato, diced; 2 pounds boneless chicken thighs or breasts, cut into small pieces; 1/3 cup low-fat sour cream; 1/2 cup raw cashews; 3/4 cup loosely packed mint leaves; 1 large lime, halved; 2 tablespoons chopped cilantro; 3 green chiles, coarsely chopped