The meat can be fish, beef, mutton, chicken breast, especially beef. If beef is too expensive, eat chicken breast.
Eggs are edible. But eat less.
Don't drink milk, be careful of all sweet things, such as all kinds of sugar, all kinds of milk (lactose) and all kinds of fruits (fructose), which will make your blood sugar rise and fall, making it harder to starve to death. If you want to eat, you must eat before meals, not after meals.
Try to be light, eat less salty and spicy, and avoid drinking, because these things will make you want to eat staple food more and unbearable.