Chicken Curry with tomatoes

700 g sweet potatoes , peeled, coarsely chopped (kumara) 2 teaspoons oil 1 brown onion, finely chopped 2 garlic cloves , crushed 2 teaspoons grated fresh[...]

6 tablespoons flour 3 teaspoons salt 1 1/2 teaspoons cayenne pepper 3 -3 1/2 lbs boneless skinless chicken breasts , cut into 1 inch pieces 6 tablespoons[...]