Meanwhile, in a medium saucepan, heat the remaining 1/4 cup of stock, 1/4 cup of heavy cream, 1 tablespoon of butter and the Old Bay spice over low heat for about 1 minute. Season with salt and pepper. Add the shrimp, cover and cook for 3 minutes. Using a slotted spoon, transfer the shrimp to the plates with the risotto. Bring the liquid left in the pan to a boil and cook until slightly thickened, about 1 minute. Remove the pan from the heat and add the minced chives. Pour the reduced cooking liquid over the shrimp, garnish with the long chives and serve immediately.