This is what I come home to almost every day, a big ole dookie in the salad bowl. How can I make him not despise it so much? He is about 7-8 inches long
You may not be able to. When they're little they often prefer bugs so they get enough protein to support their growth spurts. The extra salad (that hasn't been pooped in) can be fed to your bugs (roaches and crickets anyway). Just keep salad available regularly so it's a familiar option. When their growth slows at around 12-18 months old, they slowly transition to mainly vegetarian so it's important they start digging into a nice varied salad at that point. If it's already familiar that sometimes makes it easier.
Sat a young age, beardies don't need to consume many greens and instead focus on protein. When they're older though, you can not give them any protein for a short while and only give salad. When hunger sets in, he/she would eat it.