Who was she?? PLZ HELP ME

I saw an episode when martha had some woman (actress i think) on the show, who talked with martha a bit then cooked in the background whilst martha had other guests on. She was kind of an amature at cooking i think. She fried somethings and showed how she sliced/diced a few things I think. WHO WAS SHE?? her first name may have been amy... but i really cant recall. It may have been an episode close to the one with hayden Hayden Panettiere from heroes, but i am pretty sure it wasnt keri russell.

Plz help me if you know who this was or might be!