Curried Coconut Chicken with Rice

2 lb chicken, cut into chunks
1 t. salt and pepper
1 1/2 T. oil
2 T. curry powder
1/2 onion, chopped
2 cloves garlic
14 oz can coconut milk
14.5 oz can stewed, diced tomatoes
8 oz can tomato sauce
3 T. sugar
Salt and pepper chicken.  Heat oil and curry powder over med-high heat for 2 minutes.  Add onions and garlic and cook another minute.  Add chicken and cook over medium until cooked through, 7-10 minutes.  Add remaining ingredients, cover and simmer for 30-40 minutes.  To thicken, remove lid at the end of cooking.  Serve over rice.