Regular lettuce and broccoli are not good to feed the chameleon or the insects.
I use the same greens and veggies to feed/gutload the crickets that I use to feed to the veiled chameleons....greens such as collards, escarole, endive, dandelion greens, kale, etc and veggies such as carrots, sweet red pepper, squash, zucchini, sweet potato, etc. I also offer the chameleons a small amount of fruit such as apple, pear, berries, melon.