Press the tofu to remove excess moisture, then cut it into cubes.
Heat sesame oil in a large skillet over medium-high heat.
Add the tofu cubes and cook until golden brown on all sides, about 7-8 minutes.
Remove the tofu and set aside.
In the same skillet, add garlic and ginger, and sauté for 1 minute.
Add the bell pepper, broccoli, and snap peas; stir-fry for 3-4 minutes.
Return the tofu to the skillet.
Pour in the soy sauce, stirring to coat all ingredients.
Sprinkle sesame seeds over the stir fry.
Season with salt and pepper to taste. Serve hot.