01 - Pat the tofu dry and cut into 3/4-inch cubes. Toss with cornstarch until evenly coated. Heat vegetable oil in a large non-stick skillet over medium-high heat. Add tofu cubes and cook, turning occasionally, until golden and crisp on all sides, about 8-10 minutes. Remove and set aside.
02 - In a small saucepan, whisk together orange juice, soy sauce, maple syrup, rice vinegar, ginger, garlic, and orange zest. Bring to a simmer over medium heat. Add the cornstarch slurry and cook, stirring, until the sauce is glossy and thickened, 1-2 minutes. Remove from heat.
03 - Return the cooked tofu to the skillet. Pour the sticky orange ginger sauce over the tofu and toss to coat evenly. Cook for 2-3 minutes, allowing the sauce to bubble and glaze the tofu. Remove from heat.
04 - Heat sesame oil in a clean skillet over medium heat. Add spinach or kale and sauté until just wilted, 1-2 minutes. Drizzle with soy sauce and sprinkle with sesame seeds. Toss well and remove from heat.
05 - Divide cooked rice among four bowls. Top with sticky orange ginger tofu and sesame greens. Garnish with sliced spring onions, additional sesame seeds, and orange wedges if desired.