Drain and press the tofu to remove excess moisture, then cut into bite-sized cubes.
Chop the bell peppers, broccoli, and snap peas, and prepare the stir-fry sauce by mixing soy sauce, oyster sauce, and chili sauce.
Heat 1 tablespoon of vegetable oil in a skillet or wok over medium-high heat and cook the tofu until golden brown and crispy, about 5-7 minutes.
In the same skillet, add another tablespoon of vegetable oil, sauté minced garlic for 30 seconds, then add the chopped vegetables and stir-fry for 3-5 minutes.
Add the cooked tofu back into the skillet, pour the stir-fry sauce over the mixture, and cook for an additional 2-3 minutes.