Feeding veggies to 4-5 Beardie

Have Monty 4-5 month old and having trouble feeding veggies. Eat crickets and wax worms-- no issue-- although I did notice larger crickets seem to stay around longer feedign 1/2'

So offering Collard, Mustard Carrots- eat small. I mean 2-3 piece of carrot occasionally.

Offered in feeding dish and on a flat piece where I place the crickets but he just isn't diving in.

So any tricks- some veggie or fruit that they LOVE-

When should I feed veggie-- first thing in the morning, evenings, etc

Any tips are appreciated.

Thanks