Press the tofu if time allows, then cube it.
In a hot wok, add 1 tablespoon oil and fry tofu until golden on all sides, about 10 minutes. Remove and set aside.
Add remaining oil and stir-fry carrots, snap peas, and bell pepper for 5 minutes.
Mix teriyaki sauce, garlic powder, ginger powder, and sesame oil in a small bowl.
Return tofu to the pan, pour the sauce over everything, and cook 5 more minutes, stirring well.
Remove from heat, sprinkle sesame seeds, and serve over rice or noodles.