1 stalk rosemary, leaves removed and finely chopped chives
Method
Preheat your oven to its highest setting, usually 260°C/240°C fan.
Toss the mushrooms and sprouts with the olive oil, garlic, salt and pepper in a bowl. Transfer to a lined baking tray and cook for 20 minutes until golden brown.
Turn the oven down to 220°C/200°C fan, and remove the tray from the oven. Add the cherry tomatoes, mix, then lay the strips of pancetta over everything and return to the oven for 10 minutes. Remove from the oven, drizzle immediately with the balsamic vinegar and toss again.
Meanwhile make the polenta. Bring the milk and stock to the boil, add the salt. Add the polenta in a steady stream, whisking constantly. Keep stirring until thickened (this usually happens very quickly, about a minute). Then stir in the butter, Parmesan and herbs.
Spoon the polenta onto four plates, then top with the mushroom and sprout mix, and some extra chives.