Yes, @Julianek is my forum BFF. 
I guess the trick is to cook at home. My wife is an awesome chef and she cooks lunches and dinners for us (I normally don’t eat breakfast). I work 2 days in the office and 2 days remotely at home - in the office we have microwave, so I take lunch and others snack with me. At home we eat normally together with my family. Most of the dishes we eat are traditional Polish recipes, so we eat lots of soups - which we both like and are relatively cheap.
My budget is usually between 400-500, but when I have guests from Poland or I roll out a BBQ, it can blow to 700-1000.
These are my numbers from last year (per month):
339.82 300 460.1 463.9 574.6 296.32 705.85 447.5 616.25 589.5 620.72 329.45
This is this year (it’s bigger because we had more friends visiting us and I’m too lazy to split the receipt into multiple categories, so here are also Pampers and other stuff):
539.1 472.3 440.5 710.6 763.8 910.33