Yes, you can absolutely freeze breakfast burritos. Wrap them individually in aluminum foil and then pop in oven/toaster oven/microwave (out of foil in microwave, of course). Overnight French toast. If you have time to make a Costco run, lots of freezeable stuff there.
More for you than your toddler, though not off-limits:
If you are planning to nurse, oatmeal is your friend. Either way, I highly recommend batches of these -- you can also freeze them. 30-45 seconds in the microwave and they're good to go:
http://greenlitebites.com/2009/03/07/banana-oatmeal-cups-with-chocolate-chips/.
Also recommend making a batch of hard boiled eggs every few days - easy one-handed protein boost.