200g/7oz courgettes, trimmed, cut into 1cm/Β½in cubes
1 garlic clove, finely chopped
1 unwaxed lemon, finely grated zest, plus 1 tbsp lemon juice
2 shallots, finely chopped
3 sprigs fresh thyme, leaves only
200g/7oz risotto rice
salt and freshly ground black pepper
750ml/1ΒΌ pints chicken or vegetable stock
25g/1oz unsalted butter
4 heaped tbsp grated parmesan, plus extra to serve
200ml/7fl oz white wine