Bring a large pot of water to a boil with a large pinch of salt. Once boiling, add rice and cook until tender, 25-30 minutes. Drain and return to pot. Keep covered until rest of meal is ready.

Wash and dry all produce. While rice cooks, peel carrot. Using a vegetable peeler, shave it into ribbons, running blade down the length. Repeat with zucchini. Cut any large broccoli florets into small, bite-size pieces. Trim, then thinly slice mushrooms. Mince or grate garlic. Peel and mince ginger.

Trim scallions, then cut into 3-inchpieces. Halve each piece lengthwise, then slice as thinly as possible to create matchstick-shaped slices. In one small bowl, toss scallions with vinegar and a pinch of salt and set aside. In another small bowl, stir together soy sauce, garlic, ginger, and 1 tsp sugar.

Heat a drizzle of oil in a large pan over medium heat. Add carrot and zucchini. Cook, tossing frequently, until tender but still crisp, 4-5 minutes. While carrot and zucchini cook, place broccoli in a medium bowl with a splash of water and cover bowl with plastic wrap. Poke a few holes in wrap. Microwave on high until just starting to become tender, about 1 minute.

Remove carrot and zucchini from pan once done and set aside. Heat a large drizzle of oil in same pan over medium heat. Add broccoli and mushrooms and cook, tossing, until completely tender, 2-3 minutes. Season with salt and pepper. Remove from pan and set aside.

Pour soy sauce mixture into same pan. Bring to a simmer and let cook until slightly thickened, 1-2 minutes. Divide rice between bowls. Arrange carrot, zucchini, broccoli, and mushrooms on top. Garnish with scallions and sesame seeds. Drizzle with sauce from pan and sriracha (to taste).