I am also interested, because I wrote "The famous cook is interested and able". My dictionnary says "interesata" but explanations would be great. All I can say is that "-ata" is the 'participe présent passif' which I would translate as passive present participle.

I think you could say "interesiĝas", but I'm not sure.

The dictionary at lernu.com says you can.

:)

able, capable, apt, qualified

*is