I am super glucose-intolerant, so a keto diet is my way of life.
I make sure to eat mostly fat, keep my protein around 60 gm/day and limit carbs to about 30 gm/day.
I eat eggs, lovely European cheeses, bacon, all sorts of pastured meat, wild salmon, liver and liver pâté, bone broth, occasional nuts, minimal veggies (FODMAPS-intolerant), seaweed salad, olives, pickles, heavy cream in my tea, and chocolate butter.
Apples are just bags of sugar! I eat a few berries, but keep fruit to a minimum. Not tempted by carbs much these days...