Preheat the oven to 180°/fan 160°.
Lay out the cubed tofu and cauliflower florets on a large baking sheet or dish. Sprinkle them with 2 tablespoons of cornflour, mix it around, and bake in the oven for 10 minutes.
Meanwhile, mix the soy sauce, water, maple syrup, sesame oil, garlic, ginger, and rice vinegar together in a small pan. Place this over a medium heat, and let it simmer away for 10 minutes, until slightly thickened and glossy.
After 10 minutes, take the cauliflower and tofu out of the oven and pour the sauce over them. Give them a good mix around until they’re all coated. The sauce should begin to thicken here as it mixes with the cornflour coating on the tofu and cauliflower.
Return it to the oven, and cook for 10 more minutes.
Serve with rice, steamed or raw veggies, and a sprinkling of sesame seeds and green onions.