Help!!! For tree monitor picky eater

Hello I have tree monitor that is about 1 year old . I’m getting frustrated that he only eats dirt yes u did Hear that right. He’s supper picky he only eats crickets, egg and once while pinkies alive only not frozen I have try to feed him mix food and he does not accept it . From meal worms , wax worms ,roaches of all kinds , silk worms , butter worms , live and dead grasshoppers. Quail eggs . And there’s no interest can anyone help me I don’t know what to do . I have try bending the insects in the egg still does not work . I have try putting around 80 large crickets on his house but he prefers dirt has anyone had any issues like mine .