A delectable combination of fish and mushroom.
Combine fish with onion, lemon juice, oil, salt and pepper, stand 15 minutes.
Heat pan, add fish mixture, cook until tender, turning once. Remove fish from pan, add mushrooms, shallots and mustard to pan, cook 1 minute.
Add combined cornstarch and light evaporated milk, bring to boil stirring, spoon over fish.
Use perch or bream in this recipe and you can't go wrong.