Gotcha pork roast (the mock roast from Food Wars)

Steps

1. Peel the potatoes, cut them into large chunks, then cook them in a pot of salted water until they yield without resistance to the tip of a knife.
2. Drain the potatoes and return them briefly to the hot pot to dry them out; mash them with butter, salt, and pepper until you get a dense, not runny, mash.
3. Finely chop the king oyster mushrooms and the onion, then sauté them in a skillet with the oil until the water from the mushrooms has evaporated and the mixture smells toasted and slightly sweet.
4. Mix the mushrooms and onion into the warm mashed potatoes; taste, adjust the seasoning, then shape into a compact log with slightly damp hands.
5. Lay out the slices of smoked bacon, overlapping them, place the potato log in the center, then wrap it completely to form a tight roast; tie with twine without crushing it.
6. Place the mock roast in a baking dish, add the rosemary, then bake until the bacon is golden, glossy, and crispy on the edges.
7. During cooking, reduce the red wine with the soy sauce, mirin, and sugar until you get a dark, glossy sauce that coats the back of a spoon; off the heat, add a little butter to round it out.
8. Let the roast rest for a few minutes so it holds together, remove the twine, drizzle with hot sauce, and serve in thick slices with the remaining sauce on the side.