When you cook meat or fish, you should never reuse “raw” marinade. With tofu, though, the marinade doesn’t have the same health risks. Re-add the marinade to your tofu dish at the end of cooking for more of the recipe’s flavor.
- You should not store a marinade that’s been used for raw meat. If you use a raw-meat marinade in a sauce, you should cook it (and anything that touches it) immediately, and thoroughly.
- If you are cooking the marinade in the sauce, it is no longer “raw” – this can be reused.
On a related note, see this article for tips about grilling/broiling tofu.