Several slices of bacon, with eggs fried in the bacon grease? If you scramble the eggs, mix them with heavy cream instead of milk or water, for a lovely taste and higher fat.
If you are hungry, the safest source of calories is fat, because it stimulates insulin secretion the least, and insulin secretion is what we are trying to avoid on this way of eating. Fry your meat (be sure to pick fatty cuts, such as rib-eye, or chicken with the skin still on) in fats such as butter, tallow, or lard, make gravy with heavy cream and the pan fat, or if you don’t want gravy, butter your meat.
The idea is not to go hog-wild with the fat
, but to replace all the calories you are no longer getting from carbohydrate. It is not a good idea to consciously cut calories, either; eat fat until you’re satisfied. This may involve a large amount of food at the beginning, but as your insulin level drops and your satiety signaling reasserts itself, you will find your appetite at a level that gives your body enough energy to heal. (If you have any excess stored fat, the body will maintain your appetite at a level that will allow it to burn both the fat you eat and the excess stored fat, without your needing to count calories.)