Which are the high cholesterol foods to avoid?

My grandpa had been advised to eat low cholesterol foods but still he loves to gorge on high cholesterol foods. Doctors had given a very strict warning this time, otherwise he’ll have to face a surgery. I’m worried about his health and don’t want him to face surgery so please tell me about the high cholesterol foods to avoid, so that I could keep a check on his diet. Also it would be appreciable if you could please provide me recipes of some low cholesterol foods. Thanks in advance guys!