My husband and son have been doing keto for nearly six years now.
My husband is closer to a carnivore diet, and what he does is grill a lot of meat and cook bacon on Sunday such and then eats that all week. He adds in nuts and cheese for snacks (but not much). He eats sardines for the benefits of fish, but we also eat fish a few times a week. The veggies he will eat, (when he does), are cabbage (cooked with sausage), cauliflower (made like mashed potatoes), collards, brussel sprouts, and asparagus.
That sounds yummy. Except for the fish part. I gag it down once in a while, though.