If subbing tofu for the salmon, you may want to cook it longer to get it slightly crispy. You could remove the veggies, keeping them warm, and continue cooking the tofu for an additional 20 minutes.
This is nice over brown rice, or go without, for a low-carb dinner. Feel free to sub any other quick cooking veggies- snow peas, asparagus, bell pepper…etc. Thicker cuts of salmon work nicely here.