Barley Casserole recipe

Recipe for BARLEY CASSEROLE (because I just ran across the written recipe that I can never find when I want to make this dish):

BROWN: 
1/2 cup of pearled barley and 
1 large onion (or two mediums, etc) and 

3/4 cup mushrooms (a small can of stems and pieces), in
1/4 lb of butter (one stick).

ADD:

2 cups (cups, not cans) of beef consume'

COOK:
350 degrees, in covered dish, until liquid is absorbed (approx 1 hour, maybe longer).

FINISHING TOUCHES:
Pimento for color, salt and pepper as desired.