Thank you for the many replies!
I will be cooking for 3: My wife, my 2year old picky-eater daughter and myself.
The theme day idea was mainly to get myself interested to cook because for me it is just a waste of time.
Cooking for 30min-1h and eating in 10-15min doesn’t make the time sense. (Especially because I am trying to start my own company and got a deal with my wife that she works full time and I would be ‘houseman’ while in early morning working on my company)
All of you have had many good idea’s and I will try them out.