How do you fix broken pottery?

Weldbond has been recommended by many.

Mix it 5 parts of water per 1 part Weldbond and apply to each edge of broken ceramic to seal.

After that's dry, working with two pieces at a time, apply undiluted Weldbond to each edge and wait until slightly tacky. Press the pieces together and hold with masking tape until dry.

Weldbond dries clear and is nontoxic, so you should have a usable, attractive bowl when finished.

Another option is to take the bowl to a ceramics shop where they can repair and re-fire it, often make it look new again.