My son is out at the moment but when I see him (maybe later, maybe tomorrow, maybe next week who knows

Ready Brek and Porridge are great for breakfast as they contain carbs which will give you energy fist thing but will also be burnt off during the course of the day. Late in the evening as Sydney says a veggie stir fry is good or grilled chicken breast (without the skin) or grilled / poached fish. I know it is hard later in the evening because your knackered and just want to eat and then relax but as long as you stick to things that don't contain carbs . Also pitta bread is not too bad, so perhaps you could make fajita style thingys but in pitta bread.
Hope this helps for now until I can speak to my son
Rgds Jackie