Heat a large frying pan with oil, saute chicken until golden, remove from pan, drain, place in slow cooker.

Saute chopped onion & crushed garlic in saucepan in extra oil until transparent, add lemon juice, lemon rind, tomato sauce, brown sugar, mustard, curry powder, vinegar, soy sauce, salt and pepper.

Cover, bring to boil, remove from heat, and pour over chicken pieces.

Cover and cook in the slow cooker for 2-3 hours on high.

Serve with steamed Rice.