hey mate, you can feed ur beardies any fruit and veg ,( besides avacado, and citrus or onion based, corn can be used but they dont really digest it fully, lettuce is useless) small mouth size peices, as for mealworms or superworms, you dont need to put them on top, u can use crickets if you wish, mealworms can cause issues, i would provide a small amount for your beardies of both crickets and vegies each day, you will discover wat they dont like, also rememnber to dust ith calcium and vitamins, if feeding live food, minmise wat they can hide under, by taking out and putting into another enclosure for feeding, or just staying limited with substrate and furniturings to start off with, once u have discoverd their favourites, you can alternate, from live food one day and vegies the next, beardies will nearly always eat the live food first, until they are full, so allowing them to get a little hungry will encourage them to eat vegies, also saves u money on crickets ect, once u see they are growing and healthy, you can add ur furnitings again, and even give a no feed day once a week, this keeps them fit and they will eat all there food. as for how many crickets just place in a couple at a time, and watch as they eat, when they wont chase anymore, stop and remove wat u can, also try crucshing some crickets heads and placing on food tray, the crickets still twitch but wont get away, it also covers vegies in cricket brains, they likle that.
i consider mealworms and such, as treats. also rose petals, hibiscus etc can be used.