That really looks good! The lemon, fish and rosemary would go so well together. Those are interesting purple potatoes -- so short and round. I've grown Magic Molly purple potatoes. They, and the ones you are using, are nice because they are purple all the way through. It would be fun to make an "all purple" meal, with the purple potatoes, purple broccoli, purple beans, red cabbage that's really always purple, lol. There's a baking challenge! ; )