Return the pan to the heat and add the remaining 2 tablespoons oil. Let heat for 30 seconds, then add the asparagus and broccoli, along with 1/4 cup of the stir fry sauce (be careful-the sauce may splatter a bit on the heat). Cook until the veggies are crisp-tender, about 5 minutes. Add additional 1/4-cup sauce, reserved tofu, tomatoes, and green onions. Cook 2 additional minutes. Stir in the mint, then serve over rice, garnished with additional green onions and sauce as desired.