FILLING:

1 c. fresh or canned sliced mushrooms, drained
1/2 c. chopped onion
2 tbsp. butter
1/2 c. dairy sour cream

MEAT LOAF:

1 1/2 lbs. ground beef
3/4 c. Quaker oats (quick or old-fashioned), uncooked
1 egg
2 tsp. salt
1/4 tsp. pepper
1 tsp. Worcestershire sauce
2/3 c. milk

FOR FILLING: Lightly brown mushrooms and onion in butter in a medium skillet. Remove from heat; stir in sour cream.

FOR MEATLOAF: Combine all ingredients thoroughly. Place half of meat mixture in shallow baking pan. Shape to form an oval base.

Lengthwise down the center, make a shallow well for the filling. Spoon filling into well. Shape remaining meat mixture over filling making sure all of the filling is covered. Seal bottom and top meat mixture together. Bake at 350 degrees for about 1 hour. Let stand 5 minutes before serving. Makes 6 servings.