The correct choice is Option 3: 'Sauté onions → Add meat and other vegetables → Pour water.' The text explains the sequence: 1) Sauté onions until golden ('玉ねぎは...炒めてください'), 2) Add meat and other vegetables after ('そのあとで肉と他の野菜を入れます'), 3) Add water only after the ingredients become soft ('水を入れるのは、すべての具材が柔らかくなってからです'). This perfectly matches Option 3.