Ketchup Beef Stroganov
["1 lb beef sirloin, cut into thin strips", "2 big onions, thinly sliced", "1 tsp salt", "1/2 tsp black pepper", "4 Tbsp vegetable oil", "1 c. ketchup"]
["In a medium glass bowl mix all ingredients together and stir well.", "Refrigerate over night.", "In a medium skillet, over medium heat cook the marinated meat with juices for about 45 minutes, or until meat is tender, stirring occasionally.", "When almost done, stir in 1 cup of ketchup and let boil about 1 minute, stirring constantly.", "Serve over", "fries."]
["beef sirloin", "onions", "salt", "black pepper", "vegetable oil", "ketchup"]