KISS is keep it simple sweety (or some say stupid) Basically you eat a really simple menu consisting of whole foods. Basically when I do it I have all the Lc veggies I want (just take the allowed list from the Atkins induction). Protiens and fats. Just no processed foods, caffine, coffee, dairy, or other things with added carbs. It gets dull fast but really works to kind of detox.

A sample menu would include
Breakfast
eggs with zucchini hashbrowns or shredded cabbage. Maybe an omlette with mayo and spinach filling

Lunch
Large salad with diced meat and olive oil dressing

Dinner
Meat with a veggie side (such as spaghetti squash) and a veggie as a veggie (brussle sprouts with butter maybe) Or another salad