Try the Stickies in the beginner forum?
TC has one with Beginner articles, I"m pretty sure it links to CT’s ‘Nutrition for Newbs’ or something like that. It covers the basic tenants of eating clean, which leads to dropping fat.
Other than that, there’s not really all that much to nutrition. There’s Berardi’s ‘Massive Eating’, the Anabolic Diet thread, and Thib’s ‘Carb Cycling Codex/Beast Transforms’ articles because they refuse to archive the T-dawg 2.0 diet. That’s it. Lonnie Lowery covers the finer points, and if you want to get manic you can always surf CT’s forum for finer and finer details on how to pulse your protein and optimize your PWO nutrition, but that would definitely not be beginner stuff.
Long story short, you’re not going to find much beginner stuff outside the stickies and articles linked in the stickies. If you want more information, consider yourself graduated from the Beginner forum and head over to the Supps and Nutrition forum.