Cook the onion on some oil till it's all nice and caramelised. Move from the heat, add garlic, maple syrup, Chilli if using and stir to combine. Return to the heat, stir for a short minute and add water. Bring to a boil, turn off the heat. Add tofu slices and gently immerse in the sauce. Set aside.
In a large bowl, toss radicchio, apples and persimmon. Transfer to a nice plate, put the tofu on top and drizzle with sauce left. You can also put everything into the bowl and crumble the tofu in smaller pieces and toss gently with the sauce left. Serve immediately.