1 medium onion, peeled and finely chopped
225ml/8fl oz carnaroli rice (or other risotto rice)
salt and freshly milled black pepper
725ml/1ΒΌ pints chicken or vegetable stock
25g/1oz butter
1 heaped tbsp crème fraîche
1 large egg
2 large egg yolks
75g/3oz finely grated pecorino, plus some extra for sprinkling
125g/4Β½oz cubetti pancetta or chopped bacon