huby, our LO also went through a time where he didn't eat much than toast or pasta. I just kept offering other foods (like veggies, fruits, etc.) and didn't fret about it. I agree that you shouldn't worry too much about it, the LO could pick that up and become more picky or eats less. Just keep offering healthy foods, most babies know what and when to eat. In order to get him to eat some veggies with the toast we started putting spreads (like avocado, or even cream cheese) on the toast. For the teething our LO also loved cucumber (we sometimes only gave him the juicy seed part), watermelon, orange slices, and in general everything juicy and cold. Have you tried roasting sweet potatoes, squash, carrots or apples in the oven? It brings out all the sweetness and is still healthy.
I also have to admit that everytime Hayden didn't eat much we resorted to puree or baby cereal, which he would still eat. I don't think it is a bad thing and it gets them to eat some needed nutritions.