1. Not cleaned. If foie gras is not cleaned, it may taste like sand. So the foie gras should be thoroughly cleaned before cooking.
2. Goose liver has a rough texture. If the texture of foie gras is rough, it may taste a bit like sand. Generally speaking, good quality foie gras should be smooth and rich in fat.
3. Improper cooking methods. If the cooking time is too long or too short, or the cooking method used is not suitable for foie gras, the taste of foie gras may deteriorate, like sand.
4. The quality of foie gras itself is not good. If the source and quality of foie gras are poor, the taste may also be affected.
If none of the above methods can solve the problem, it is recommended to seek the advice of a professional chef or try another restaurant.