Ingredients: 
2 pounds boneless skinless chicken breasts, cut into 1/2-inch chunks 
1 teaspoon salt and pepper, or to taste 
1 1/2 tablespoons vegetable oil 
2 tablespoons curry powder 
1/2 onion, thinly sliced 
2 cloves garlic, crushed 
1 (14 ounce) can coconut milk 
1 (14.5 ounce) can stewed, diced tomatoes 
1 (8 ounce) can tomato sauce 
3 tablespoons sugar