No, not a lot of fat at all! A few tablespoons of olive oil in a bowl, add salt and pepper (and a little cayenne is nice too). Toss the sprouts (they should be dry - if you've washed them make sure of that). Then roast on a cookie sheet at 375-400 until done, shaking them up a few times to make sure they get done on all sides. They are delicious, even people who don't like sprouts will love them, usually.
I also love Parsnips but they are not easily available here. We ate them a lot when we lived in England, but my DS HATED them with a passion....