Lightly press the tofu block between your hands over the sink, to get rid of as much water as possible, then wrap in paper towels and set aside.
Put the soy sauce, brown rice syrup, garlic, ginger, pear, spring onion whites, sesame oil, gochujang and two tablespoons of water in a bowl and whisk to mix. Unwrap the tofu from the kitchen paper and cut widthways into ¾cm-thick slices.
Step 2 : Preparing the cooking
Heat up two tablespoons of the rapeseed oil in a large frying pan over a medium heat, and have ready a large plate by the side of the cooker.
Fry the mushrooms in batches, so that each slice can touch the base of the pan (otherwise they’ll sweat, rather than fry), until they turn golden – each batch should take about five minutes – then transfer to the plate and repeat with the remaining mushrooms.
Coat the bottom of the pan with the remaining rapeseed oil, then fry the tofu for about four minutes, turning once, until golden on both sides.
Tip the mushrooms back into the pan, stir in the soy and gochujang, and cook for five minutes, until the sauce has reduced and coated everything.
Step 3 : Garnish
Sprinkle over the chopped spring onion greens and serve with rice.