dmnf

支持隔夜餸, 一次過煮多D, 分數歺食, 唔洗曰曰煮, save time
I know some local people always use Sunday to cook main dishes for the rest of the week.  Freeze up or just fridge.  Add salad each day.  Quick and easy supper.  
唔食隔餸 means someone has 縱壞了你,
Nowadays with fridge and food safe knowledge, home cooked food can easily last for 3-4 days.  Take out foods 1-2 days only.  
Long live 隔夜餸 except beef.

dmnf

I am not a cook or nutritionist.  I just like cooking, time saving and good health.  
To answer the questions:
Home made foods I tend to keep long because I buy meat from big supermarkets (Superstore does not count).  I defrost meat in the fridge and never leave it at room temp. for more than 20 mins.  I always think outside foods especially the food court stuff or 熟送 use close to expire meat and their cooks don't have time to follow food safe procedures.  Otherwise, I don't know how can they keep the price so low.  Take out food from good restaurants I will keep longer because I don't think they will cut many corners.  

Beef should eat right after cooking.  番叮 will make it very dry.  I tried to pre-cook primerib or New York.  No good and wasted the beef.

You can 番叮 or most of the time, I stream to re-heart 隔夜餸

每日都番熱／番叮啲餸，咩營養都冇晒啦.  Yes, correct.  So do I don't use microwave oven.  It can easily damage the nutrition.  Steam warm is better.  Also, I only use main dish (meat mostly) as 隔夜餸.  Vegi is always same day cooking.  炆牛暔,  麻婆豆腐, 炆排骨, 宮寶雞丁 they are still very good after steam reheat.

Health is as important as a successful career.  You need good health to enjoy your fruit.  You don't want to spend your hard earned money on medical stuff.  Good nutrition doesn't take too much time as long as you plan ahead.  May be we should suggest 譚太 to create a new cooking program for today's busy work class.

dmnf

oh no.  If it is such long work hours, I will go for sleep and eat TV dinner.  
But I wonder, how long you can do 12-hr a day work.  Occasionally I can.  but not year are year.  Begins to off topic now.