I know that when we start out, it's easy to go to an extreme, but honestly, that's what I'd expect a toddler to eat for a day. It's not enough food or variety.
1 bowl of cereal, 1 banana and 2 slices pizza? Thats not a balanced day at all.
Use www. fitday .com or www. thedailyplate .com to track and you'll see that a lot of nutrients are lacking. There's no substitute for whole foods, vegetables, natural foods!