To give an idea of having fitness with a simple, as well as a hybrid, diet, while having not trained and hardly exercised since spring '20:
I've typically had two meals a day.
Meal, consisting of meat (mainly Epic bison bars), fat (mainly olive oil, but with butter I turn into Adonis!, spontaneous wood and all after a couple hours), veggies. Cooked (not pre-cooked!, sheesh) and packaged chicken or beef or fish with seasoning and veggies but no other junk (like wheat, sugar, etc) will do.
Snack meal consisting of two (or four) sunflower butter cups, a Perfect peanut butter bar, some chocolate (at least 65% cocoa, though usually at least 70%+), pistachios, and a greens/mushroom profile powder with water and (the real kind of) straight cranberry juice - and when in season on certain days I have included a standard-ish coffee cup full of pumpkin ice cream (at least 14 grams of fat per serving!).
I've alternated these between first and second meal, though a lot of times I've had only snack meal for a few days....until my body has gotten a HANKERING FOR MEAT.
Liquid consumption: at least a gallon of room-temperature water, and nothing else, a day.  (I've included almond, coconut, and hemp milks over the years, but not lately.)
I haven't cooked or really made anything in years, and when I did I mainly pan cooked some ground beef or chopped chicken or salmon (no oil, etc) or canned fish, and seasoned it, then poured olive oil on/in it, added in or included in the bowl some 'cooked' veggies (kept in the fridge and have not heated), and ate it.
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