Make sure you have 3 cups cooked brown rice. If you don’t, cook 1 cup brown rice and cool completely.
Heat oven to 400ºF (204ºC).
Cut 14-ounce block tofu horizontally into 3 planks, wrap tofu in a clean absorbent kitchen towel and set something heavy on top (like a cast iron skillet), let tofu press for 15 minutes.
Dice tofu into ½-inch cubes; toss with 1 teaspoon grapeseed oil to coat; arrange in a single layer on prepared baking sheet and season with salt. Bake tofu until golden brown and firm to touch, about 30 minutes.
Meanwhile, heat a 12-inch sauté pan or cast-iron skillet over medium-high. Add 1 tablespoon grapeseed oil and swirl to coat; once shimmering add 1¼ cups diced carrots, 1¼ cups peas, and ½ cup sliced green onions; cook until carrots are tender, about 5 minutes; season lightly with salt and black pepper. Transfer vegetables to a bowl.
Add remaining 1 tablespoon grapeseed oil to now empty sauté pan over medium heat and heat until shimmering, add 2 teaspoons minced garlic and 2 teaspoons minced ginger and cook 15 seconds until fragrant.
Stir in 3 cups cooked rice, breaking up any clumps, and press into an even layer; cook, without moving, for 3 minutes. Using a wooden spoon, stir rice, scraping bottom of pan as needed, reduce heat to medium, and stir fry until rice is golden brown, 4–5 minutes.
Stir in baked tofu, cooked vegetables, 3 tablespoons soy sauce, 1 tablespoon vegan oyster sauce, 1 teaspoon chili garlic sauce, and 1 teaspoon vinegar; stirfry 2 more minutes. Off heat, stir in 2 teaspoons sesame oil and remaining ½ cup scallions; season with additional soy sauce and oyster sauce to taste.
Finish with sesame seeds and serve with extra chili garlic sauce or sriracha.