I usually have the same dinner or close variants 6-days a week, then after few months when I'm tired of this menu I slowly update parts of it and it then evolve

I usually have the same dinner or close variants 6-days a week, then after few months when I'm tired of this menu I slowly update parts of it and it then evolves to something new. I don't force myself in doing it, it's often just about the simplicity of knowing that a given meal has the right balance of calories by knowing it works (i.e. maintaining the same weight) from one day to the next.