Place the rice wine vinegar, sugar and sesame oil in a medium bowl. Add the thinly sliced cucumbers and toss to combine. Set aside.
Cube the tofu and toss with cornstarch until well combined. Heat the oil in a large skillet over medium heat. Add the tofu and cook until crispy, flipping on all sides. Remove from heat and toss with the sweet chili sauce, soy sauce, garlic, and ginger. Set aside.
Whisk together the mayo and sriracha together until combined. To thin, if desired, add in a splash of water or lime juice. Set aside.
Divide the rice into four bowls, top with the tofu, cucumbers, avocado, green onions, and sesame seeds. Drizzle with the spicy mayo and serve!
