100²µ/3½´Ç³ú chestnut mushrooms, sliced
250g/9oz new potatoes, quartered
½ small red onion, finely chopped
2 tsp finely chopped fresh rosemary or thyme
large handful young spinach (about 40g/1½oz)
2 ripe vine tomatoes, halved
¼ tsp dried chilli flakes (optional)
sea salt and freshly ground black pepper
2 tbsp extra virgin olive oil
1 tbsp extra virgin olive oil, plus extra for greasing
2 free-range eggs
4 vegetarian sausages, chilled (optional)