Beef Burgundy Pie
["1 lb. lean boneless beef round steak", "1 1/2 c. pearl onions (about 1/2 lb.)", "4 c. peeled, cubed red potatoes (about 1 1/2 lb.)", "2 Tbsp. margarine, softened", "1/2 tsp. salt, divided", "1/8 tsp. white pepper", "2/3 c. sliced carrots", "1 clove garlic, minced", "1 c. Burgundy or other dry red wine", "1/2 c. plus 2 Tbsp. water, divided", "3/4 tsp. dried whole marjoram", "3/4 tsp. dried whole thyme", "1/2 tsp. beef-flavored bouillon granules", "1/4 tsp. black pepper", "2 c. fresh mushroom halves", "2 Tbsp. all-purpose flour"]
["Trim fat from steak.", "Cut steak into 1-inch cubes and set aside.", "Remove outer skin from onions; set aside."]
["steak", "pearl onions", "potatoes", "margarine", "salt", "white pepper", "carrots", "clove garlic", "red wine", "water", "marjoram", "thyme", "beef-flavored bouillon granules", "black pepper", "fresh mushroom halves", "flour"]