For all that I do like cooking more complex meals, doing Baby Led Weaning with Babybear has re-introduced me to the simple pleasure of a slice of bread with a decidedly generous slathering of butter. (Hey, Babybear needs her fats, doesn't she?) As it happens I buy an unsalted butter and if possible organic as I once read an article on how they make spreads and those room temperature butters and it turned my stomach.
Certainly if you are just starting baby led weaning, the advice would be to toast the bread so that it doesn't go all claggy and get stuck in the roof of their mouths, but once the babies get better at eating (you'll know when) then I cannot recommend a good old slice of B'n'B too highly.