This is Sarah She lays olive eggs but does not have a beard or muffs. She does have a peacomb and yellow legs. She is a fiesty little hen. Kinda hyper...haha. I was beginning to wonder if she would ever lay eggs but she finally did!
If she lays olive eggs and has a pea comb, she's perhaps an olive egger. Maybe an Easter Egger x Welsummer.
Bantamlover's correct. Your bird is probably more correctly called an Olive Egger. Though, really, Olive Eggers are Easter Eggers because they lay colored eggs.