03Add 2 tablespoons butter or oil; raise the heat to medium-high and add the rice. Cook, stirring occasionally, until it is glossy and coated, 2 to 3 minutes. Sprinkle with salt and pepper; stir in the wine and let most of it bubble away.04Begin adding the pumpkin purée and stock alternately, 1/2 cup or so at a time, stirring after each addition. When the liquid is just about evaporated, add more; the consistency should not be soupy
or dry. Stir frequently.05Taste the rice about 20 minutes after you add it. You want it to be tender but still have some crunch; this can take up to 30 minutes. When the rice is done, turn off the heat and stir in the remaining butter or oil and Parmesan; taste and adjust the seasoning. Heat a dry skillet and add the nuts; toast until fragrant. Sprinkle the risotto with toasted nuts and more freshly grated Parmesan; serve.