Which of the following is an example of proper food handling?

The example of proper food handling from your options is:

**Keep your hands clean while you are cooking.**

This is crucial for preventing cross-contamination and ensuring food safety. The other options you mentioned are not safe practices:

- Only cleaning surfaces after cooking can lead to contamination if surfaces were dirty before starting.
- Thawing frozen foods on the countertop can allow harmful bacteria to grow; it's better to thaw them in the refrigerator, cold water, or the microwave.
- Perishable foods should be stored in the refrigerator, not inside cabinets, to prevent spoilage and foodborne illnesses.