In a large bowl, beat eggs and milk
Add bread; mix gently and let stand for 5 minutes.
Add beef, onion, baking powder, salt and pepper; mix well (mixture will be soft).
Shape into 1-in. balls.
In a large skillet, brown meatballs, a few at a time, in butter. Place in ungreased 3-qt. baking dish.
In a bowl, stir soups and milk until smooth; pour over meatballs.
Bake, uncovered, at 350 degrees F. for 1 hour. Sprinkle with parsley.