Press the tofu to remove excess moisture, then cut it into small, uniform cubes.
In a small bowl, whisk together the oyster sauce, hoisin sauce, and tamari until smooth.
Heat the avocado oil in a large wok or skillet over medium-high heat.
Add the tofu cubes to the pan and sear until they are golden brown and crispy on all sides, then remove and set aside.
In the same pan, pour in the egg whites and scramble them until they are just set, then remove and set aside.
Add the sesame oil to the pan, then sauté the broccoli, carrots, grated ginger, and minced garlic for 3 to 4 minutes until tender-crisp.
Stir in the cooked brown rice, frozen peas, sea salt, and black pepper, using a spatula to break up any rice clumps.
Return the seared tofu and scrambled egg whites to the pan, then pour the sauce mixture over the ingredients.
Toss everything constantly for 2 minutes over high heat until the rice is slightly crispy and the glaze is well incorporated.
Garnish the dish with thinly sliced scallions and serve immediately while hot.