Place a large frying pan on a medium heat and add half of the butter.
Add the smoked haddock fillets when the pan is hot and fry for a few minutes on each side until lightly browned and cooked through. Then remove from the pan and set aside.
Melt the remaining butter and add the spring onions/scallions and leeks. Sauté for about 5 minutes until the leeks soften and become fragrant.
Add the garlic and cook for a minute or two until fragrant.
Add the risotto rice and stir well. Cook for 1-2 minutes until the rice grains become hot.
Pour in the white wine and simmer while stir continuously until reduced by half.
Begin adding the warm fish stock to the rice, one ladleful at a time, stirring constantly and allowing each ladleful to be absorbed before adding the next. Continue this process for about 20-25 minutes, or until the rice is al dente and creamy in texture.
Stir in the crème fraîche, Parmesan, ground black pepper, and add salt to taste. Cook for an additional 2-3 minutes until all the ingredients are combined and the Parmesan has melted.
Remove from the heat and stir in the lemon juice and zest, and cooked smoked haddock.
Serve immediately topped with fresh parsley.