Saute onions in oil and 2 tablespoons of the butter until soft. Add crab meat and mushrooms, simmer for a minute. Add wine, salt, pepper and MSG; simmer another minute, then add parsley and set aside.
In a small, heavy saucepan over low fire, melt remaining butter. Add flour and cook for 3 minutes then gradually add broth alternately with milk, stirring constantly until mixture is medium-thick. Simmer and stir for 5 minutes. Add crab meat mixture and simmer for 2 minutes. Adjust seasoning to taste.
Stuff into ramekins, dust top with bread crumbs and bake in a 350 ° F oven for about 15 minutes.