Chard Gratin

I'm not entirely sure how I feel about this recipe. The source website had rave reviews, so I decided to try it - I need something to do with the chard I keep getting in my CSA. I think I probably needed to chop the chard smaller, the recipe didn't really say how to do it. Also half of the leaves were outside of the cream sauce, which resulted in a crispy charred top, which is nothing like the photo. It didn't really say what size of container to use... I used a 9x13 glass baking dish. If I try this again, I'll make sure the leaves are all covered with the sauce, so either less leaves or more cream sauce. I did weigh it out to 16 oz (I'm pretty sure that's 1lb), although the leaves were in my fridge for 1-2 days and were slightly wilted. Maybe they lost weight, so I had too many? Also, I used a shortcut from the site comments & microwaved the leaves 1 minute instead of boiling, I think this part worked great.