I think you are right Min, but I'm 'scared' to test myself as I think I will just start picking through the day if i know i can eat something...not sure i have the willpower.
It's a scary step - but you'll never know until you try. It's amazing that we fear things more than often is warranted. Once we 'get on with it' it's nowhere near as bad. ... If you had the same attitude to having kids 'oh I don't know if I'll be able to do it right' - would you have kids now?! Probably not. Go for the plunge! Never question - just take a big run up to the cliff and JUMP!
And yes. Yes you can have mushrooms and garlic.

Mushrooms are probably the most calorie light per volume ratio item available (bar lettuce) - so it's great!
Ask your LLC for a booklet; however, you can have most vegetables (broccoli, cauliflower, turnip, carrot, etc) but not the starchy kind (i.e. no sweet potato, etc). You can have quite a few salad items, onions, tomatoes, mushrooms, *green* bell peppers, etc...
You can't have pulses unfortunately, but you can have 200g tofu/cottage cheese/quorn/prawns/unoily fish and stuff.
I just know that the daily calorie intake INCLUDING packs shouldn't exceed 800-850 calories. Get familiar with vegetable calorie tables and make sure you weigh the portions. They are easy to over-do (and I did for the first month!) - BUT it teaches you a VERY VALUABLE LESSON. ... Even 'healthy' food contains calories. No food is "free" - no matter how "healthy" it is... everything. in. moderation.
It's been quite a long time since I'd finished Lite now (June 2009) - so I can't really remember everything... But I do remember the plan being really good - it taught me A LOT of things that LL abstinence didn't. Alot of those lessons are what keep me going (and maintaining!!) now.
I'd say... go for it. What's the worst thing that could happen?
xx