Mint and Mango Lamb Pitas Recipe

Name: Mint and Mango Lamb Pitas Recipe
Ingredients: 1 tablespoon rapeseed oil; 1 onion, finely chopped; 1 teaspoon + 1 pinch granulated sugar, divided; 2 garlic cloves, crushed; 1 teaspoon grated ginger; 1 pound ground lamb; 1 teaspoon + 1 pinch ground cumin, divided; 1 teaspoon ground coriander; ½ teaspoon ground turmeric; ¼ teaspoon chili powder; 1 ½ cups lamb stock; 2 tablespoons tomato puree; ½ teaspoon salt; ½ teaspoon pepper; 1 cup plain yogurt; ¼ cup fresh mint; 2 tablespoons chopped fresh cilantro; ½ lemon, juiced; 6 pita breads; ½ cup mango chutney; 1 cup diced fresh tomato; ¼ cup fresh whole cilantro, to serve