Cook until lightly browned, stirring constantly. Stir in milk with wire whisk. Cook, stirring constantly, until thickened. Return steaks to skillet, turning to coat with sauce, and simmer until hot. Place in a dish and pour orange and lemon jucies on top.
Lift steaks out of marinate and pat dry.
Reserve the marinade. Remove onions and in same skillet brown steaks lightly on each side. Add the onions, marinade and beef stock. Fill a stockpot with water and bring to a boil. Place meat in water, cover, and bring to a simmer.