2.Heat oil in medium saucepan; cook onion, anchovy and garlic, stirring, until onion softens. Add cherry tomatoes, undrained canned tomatoes, olives and parsley; bring to the boil.
3.Pour tomato mixture into medium baking dish. Place sardines, skin-side up, over tomato mixture; season. Roast, uncovered, in oven about 15 minutes or until sardines are cooked.
4.Meanwhile, make preserved lemon salsa. Combine ingredients in small bowl.
5.Serve sardine mixture topped with salsa.
Whiting or garfish fillets could be used instead of sardines.