My favorite sweater refashion is the lettuce leaf stitch on the serger. It’s basically a rolled hem with a twist, but can only be done with a knit. It makes a pretty ruffle on the sides of the sweater. This is so fast, while my family was loading up in the car for church, I made a cardigan after I realized I didn’t have anything to match my outfit. I shouted, “I’m coming!” Then I made the cut, and sat down to my serger, and in literally a minute I had myself a new cardigan. Sergers are the best thing ever.