Why are you at the mercy of your wife when it comes to dinner? If you can read, you can cook, and if you cook and it tastes nice she'll eat it!
To be able to grow, you need to be able to work hard under the iron. To work hard under the iron, you need energy and nutrition. Energy comes from the carbs like oats and bread and pasta and rice, nutrition comes from the fruit and vegies. To recover after the iron, you need some more carbs and some protein.
That's why I always say: eat lots of fresh fruit and vegies, nuts and beans, and some meat/fish and/or dairy. If you want to grow, have lots of starchy food like oats and so on, if you want to slim down, cut down on it.
At a glance, I would say you lack fruit and vegies. Most Aussies do! Have at least one piece of fruit at breakfast, at morning and afternoon tea, and make sure vegies cover half the plate for lunch and dinner, really piled up. Every day have a handful of nuts of some kind.
You didn't list the quantities of the food either, that makes a big difference.
You don't need 3 litres of water a day, but it won't do you any harm so if you like drinking it go ahead.
It's hard to have "too much" protein powder. Unless you have kidney disease of some kind or a family predilection for it, any excess protein you consume (from powder, meat, potatoes or anywhere) will just be pissed and pooed out.
The powder will tend to give you uncomfortably solid poo on its own, but if you have plenty of fresh fruit and vegies they'll sort that out.
Most people find they are stronger in their workouts, recover from them quicker and grow more muscle if they have their protein drinks immediately before and after the workout, rather than spread over the whole day.
Best of luck! Start a journal