Every dragon is different. I hear that babies should eat betwen 70-100 small crickets per day. My girl is a bit over a year, and she will devour 30-40 medium crickets per day.
As far as salads go - give them as much as they want - it's a SALAD. It won't hurt a freaking thing.
Go by the time rule - not the quantity. Give them around 10 minutes. Plus or minus. If they can eat what is put in front of them within a time period of 10 minutes, go for it. Dragons aren't dogs - they won't gorge themselves (so far as I have been informed from the more knowledgeable posters on this site).
If they are hungry, let them eat
As a side note - my girl was a rescue and malnourished. She may have more of an appetite than a normal one year old.