350g/12oz small chestnut mushrooms, quartered
2 garlic cloves, finely chopped
50g/1戮oz baby spinach leaves
2 sundried tomatoes from a jar, drained and thinly sliced
150ml/5陆fl oz vegetable or chicken stock
flaked sea salt and freshly ground black pepper
1 tsp caster sugar
1 tsp white wine vinegar
40驳/1陆辞锄 butter
100ml/3陆fl oz double cream
200ml/7fl oz whole milk