1. BLW promotes offering baby food from our own dinner plates. How do you do that when your own dinner consists of many different ingredients that could potentially be allergenic? What happens to that "one new food every 4 days" rule, to help pinpoint any food allergies?
You don't follow such a "rule."
The only things you don't give are:
honey (botulism risk until age 1)
Whole nuts (choking hazard)
Anything of a size to be a choking hazard (usually described as grape sized)
Anything with a history of allergies in your or the father's family
Other than that, you make a healthy meal. Keep it low salt. And give LO a portion of it.
The other day we had soft tacos... I just got a veggie one for Otter. It had the soft shell, lettuce, tomato, rice, beans, cheese, guacomole, and sour cream. He tore right into it no problem.
2. Any suggested foods to start w/ for BLW? DS has already tried pureed carrots, apples, sweet potatoes and banana pieces. Should I just start w/ those, cut into baby-sized pieces and steamed? Or, are there better foods to start w/?
Fruit and steamed veg are good. Don't "cut into baby-sized pieces" as is normally thought of baby size. Big pieces are better. One of the MOST important rules of BLWing is to NOT feed LO. You offer the food and let them get on with it. Don't encourage them. Don't put it in their hands, don't (especially) put it in their mouths. That means they need to have pieces that are big enough to grab with their fist and still have part sticking out of their fist to get in their mouth.
As they get more skilled they will learn to manage smaller bits, but need bigger bits to start with.
If you can't get the book, make sure you know all the basic rules of BLWing first. In order to be done safely, it has to be done right. Make sure LO can sit up on his own without help. Put the food in front of him and (like I mentioned) don't help him with it in anyway. Even if he doesn't seem interested in it. He will pick it up and eat it when he is ready and able to handle it, not before. If you force it before, he might choke.
Also, don't intervene unless he is choking. Which is different from gagging. Gagging is normal for BLWing.