Welcome Petram! If you haven't read the book yet, here's an article based on Gill Rapley's research which gives a good intro to BLW and the main guidelines:
http://www.borstvoeding.com/voedselintroductie/blw/engels.html]
[url]http://www.borstvoeding.com/voedselintroductie/blw/engels.html[/url]
You can start with many of the same foods that you would otherwise, just don't puree them - offer them in a form that your LO can pick up on his own. The foods you mention - banana, carrots, pear and broccoli - are all great. For banana, either get the small finger bananas and offer them whole, or cut bigger ones into sticks (bit slippery!). My LO's first food was carrot - again, stick shaped so he can grab it, cooked enough so that it holds it's shape but will mush against the top of his mouth. Pear you can give raw (peeled) if it's really ripe and soft, or else stewed or poached. Or baked, I suppose! Broccoli florets have a natural handle, so just steam until they're nice and soft but not falling apart.
The theory of BLW is basically that babies will choose to, and be able to, eat food as they are ready for it - but you are still in charge of what you offer! Mainly, you should avoid offering foods with added salt (as babies' kidneys can't process it) or sugar (they just don't need it). If there's a history of allergy, you might want to hold off on common allergens or be cautious about introducing them. And don't offer things that are small and hard, eg nuts, because they ARE a choking hazard - I'm also careful with cherry tomatoes, grapes etc. I cut them in half.
We didn't start off with family meals straight away - at the start I introduced individual foods (although I didn't follow the three day rule, except for the common allergens). So a meal might be just carrot sticks and plain brown rice, or one chuck of beef and a couple of broccoli florets, or a mix of pumpkin and potato wedges. I slowly introduced herbs and spices to make things interesting. And after a few weeks, when she'd tried lots of different things, I started giving her what we were having or a variation on it.
So from the meal you mention - I would say mashed potato is fine, just put a big clump on his tray and let him go for it. But be aware that if it's made with butter or milk, they are potential allergens. Carrots, cook them in bigger pieces than you would for yourself, so he can grab them. Peas, he's unlikely to have enough of a pincer grip to be able to pick up at this stage, but he might like chasing them (make sure they're well cooked too, or squish each one a little so they're not a choking hazard). I'd avoid most bought sausages because of the salt content - but if they're home made without salt, no problem.
With toast, I would avoid jam because of the sugar content. I give it plain and my LO eats it fine! But she has a dairy allergy, so we can't use butter. If that's not an issue, try a little butter with a sprinkling of cinnamon (mmmm), philly or cottage cheese, french toast, mashed banana (messy but fun
... basically just avoid added sugar or salt (you might want to check the salt content of the bread you buy as well...some are higher than others...)
Sorry for the lengthy post. BLW is lots of fun, hope you and your LO enjoy it!