I start by tossing the chopped cucumber with ginger, rice vinegar, soy sauce, and sesame oil in a bowl. I give it a good stir so every piece gets coated. Then I just set it aside it only gets better as it sits and marinates.
Next, I cut the drained tofu into small cubes, roughly ¾ inch each. I pat them dry with paper towels first, since removing extra moisture helps the coating stick better. Then I dust each cube lightly and evenly in cornflour.
I heat olive oil in a large frying pan over medium-high heat until it shimmers. I add the tofu in a single layer and cook for about 6 to 8 minutes, turning occasionally, until every side turns golden and crisp. Once done, I move it to a plate.
With the same pan still warm, I lower the heat and add garlic, tamari, brown sugar, and sesame oil. I stir this for about a minute until it starts to thicken slightly. In a small bowl, I mix cornflour with water, then add it gradually to the pan until the sauce reaches that glossy, sticky texture I'm after.
I return the crispy tofu to the pan and toss gently so every cube gets coated in that sticky sauce. If it feels too thick, I loosen it with a splash of water. Then I divide rice and cucumber salad into bowls, top with tofu, and finish with sesame seeds and spring onion.