Gosh, you can really go anywhere! I think every place we've been has quite a choice for everyone. If you want light, then you just get fish, or salad, or just an appetizer (only you know what you like) and those that wish for a "heavier" meal can get what they want.
Another option is choosing from the kids menu; less choice but smaller portions.
Check out the menus on Deb Wills site and you'll see what I mean.