Ah, yes, the dreaded cheerio diet. Tyler's been on and off this for as long as I can remember. It's pretty normal to go crazy for a certain kind of food for a few days, then go back to normal. IMHO, your best bet is not to worry about it and let him eat what he wants, provided it's healthy. His main source of nutrition should still be breastmilk and formula now anyway, so it really isn't a big deal if his diet isn't "balanced," although it's still important to only include healthy foods. As long as constipation doesn't come into play, I really don't see anything wrong with letting him eat what he prefers. He'll be back on other foods before you know it. There are lots of ways to still get some other foods into him if it would put your mind at ease. I always used to spread veggie puree on toast, sandwiches, or crackers, and coating veggie pieces in cheerio crumbs or dry baby cereal would often make them "bready" enough for Tyler to eat.
One thing to keep in mind as your LO gets older...toddler nutrition isn't the same as adult nutrition. I've read that it's best to look at their nutritional intake over the course of several days, versus one day at a time, because they do go on streaks where they only want to eat certain things. Of course, keep offering a variety of foods, but go with the flow until he's ready to try them again. HTH!
