I do track but I can also do what you said. To give an idea of what I generally do.

Breakfast
4 eggs with pecorino cheese
6 slices of bacon
3 sausage patties
I slice of ham

According to the labels that is about 8-9 carbs

Dinner is normally meat...steak...chicken...fish...shrimp...scallops...one of those with some steamed Broccoli.

If i have a snack maybe a few times a week 2 tbls of PB....maybe a sugar free ice pop...handful of nuts

Beverages...95% of the time water...maybe 3x a week 1 can of diet root beer...maybe 3x a week Gatorade zero....which has 2 carbs in the entire bottle.

That's basically it for me.