Once the kiddo gets older and starts going to preschool or kindergarten, you're gonna have to be okay with throwing out some half eaten kids food. That's the fastest way for me to get sick (garbage collecting my kids' dinner trays).
Like the parent comment I also have been doing garbage collection from the plate and slimming my own servings in anticipation. It seems to have worked, but now that my toddler is almost 4 I've noticed that my rate of stomach bugs has increased to levels I've never experienced. I wonder if this is the reason... I hate throwing away food so, so much.