Brisket for holiday

Ingredients

Ingredients: 

7 lb Brisket; trimmed 
2 ts Onion salt 
1 tb Celery salt 
1 ts Garlic salt 
4 ts Msg 
2 tb Worchestire sauce 
1 1/2 tb Liquid smoke 

Instructions

Rub brisket with onion, celery, garlic salt and MSG, let stand for about 30 minutes. Place in a roaster and pour worchestire sauce and liquid smoke over surface of roast. Cover and refrigerate several hours. Drain off marinade, wrap brisket, fatty side up, in heavy duty aluminum foil and seal. Bake 5 hours @ 300. Allow to cool. Slice thinly --> across grain