You can go for the cold fish or chicken as described ( peppered smoked mackerel, or salmon is also good) . A quality dried fruit and nut mix is also good when you don't have time to eat properly.
Sometimes you might try something different.
This meal takes 1 hour to cook but only 20 minutes to prepare and lasts for 10 meals or more.
Beef meatballs in tomato sauce
Fry 2 medium onions and 3 cloves garlic for 3 minutes ( I use a tube for convenience) in 3 or 4 tablespoons of oil. I use sunflower/olive oil mix.
Cut up zucchini, egg plant, red pepper, green pepper, 100grams fine green beans into small pieces and fry for 5 minutes. (put some button mushrooms in near the end of cooking after you have put the tomatoes in). You can add whatever veg you fancy e.g. brocolli.
Make balls from 500 -1000grams mince meat.
Fry in separate pan - 1 or 2 tablespoons of oil.
Add seasoning, salt, pepper, cinamon, lots of paprika, a little ginger, mixed spice and chilli or cayenne pepper.
Mix 1/2 tube of concentrated tomato puree with water.
Add veg and tomato puree to meat pan.
Add 1 or 2 cans of chopped tomatoes and cook on a low light with lid on for 45 minutes or until meat is soft.
It's just a matter of throwing everything in. The paprika and cinamon make it taste good when cold and it's very satisfying. If you don't feel like making the balls then just throw the mince in the pan. But I think it tastes better cold as balls.
Store half of it in the fridge for up to 3 days and the other half in the freezer.
You can eat it with any kind of carbs - rice, potato, pasta, bread.