Well there are some differences between one veggie and another as concerns soil as well as other requirements. But for the most part a starter soil that is lighter than most other potting soils will probably be fine. The main thing that it has going for it is that it is light and that it doesn't contain any fertilizer. The
seeds provide their own nutrients during the germination process.
If you tell us what veggies you are planting we can be of more help.