Oven Barley Casserole - cooking recipe

Ingredients

1 c. pearl barley
1 can Campbell's onion soup
1 can water
1 Tbsp. chopped parsley
1 tsp. beef concentrate or 1 bouillon cube
1 (4 oz.) can mushrooms or approximately 12 fresh
4 Tbsp. butter

Preparation

Note:
I add 1/4 cup wild rice and another cup of water.