Take a walk. Eat your vegetables. Go to bed. Based on Jane Brody's Good Food Book , it's a comfort food that might brighten your day. There's quite a lot of assembly here, but this will make easily eight servings, so plan on serving it twice a week.
Leftovers are fabulous.
Simmer until tender. Drain, mash with butter, milk and salt and pepper. Meanwhile, in a large heavy skillet, heat the oil. Add the leeks and cook over medium heat until softened. Add the bok choi and the celery, and cook until bok choi is wilted.