The boss steaming and baking all-in-one machine roasts sweet potatoes in air-baking mode. The steps for roasting sweet potatoes are as follows:

1. Wash the sweet potatoes with clean water and make sure the surface is clean.

2. Prepare a baking sheet and put the washed sweet potatoes into the baking sheet. You can make a few cuts on the surface of the sweet potatoes so that the heat can penetrate more evenly during baking.

3. Place the baking sheet with sweet potatoes into the Boss Steaming and Baking Machine.

4. Turn on the all-in-one steaming and baking machine and select the air baking mode.

5. Place the baking sheet in the middle and lower position of the oven to ensure that the sweet potatoes can be heated evenly.

6. Set the baking time to 50 minutes and wait for the baking to complete.

7. When the time is up, use oven mitts or kitchen tools to carefully remove the baked sweet potatoes.

8. Wait for the sweet potatoes to cool down slightly, and you can enjoy delicious roasted sweet potatoes.