Heat oven to 220C/fan 200C/gas 7. Using your fingers, roughly break up the polenta into small chunks and scatter in the bottom of a small roasting tin. Tip in the parmesan and mix.
Sit the chicken breasts, tomatoes, and rosemary on top of the polenta, drizzle with garlic infused olive oil, then season to taste.
Roast for 25 mins until the chicken skin is crisp and golden, and the polenta and cheese are turning crusty around the edges. Serve with a green salad.
500g pack ready-
25g parmesan, grated
250g pack vine tomatoes
leaves from a few sprigs rosemary, torn
2 tbsp garlic infused olive oil