Melt butter for risotto. Add rice. Cook until rice just starts to brown. Add wine. From this point you pretty much need to stir constantly. When wine gets absorbed, add chicken stock 1 cup at a time, stirring until absorbed each time. When you add the last cup of stock, add pumpkin puree, 1 tsp salt, and nutmeg. Stir until rice is tender. When rice is tender, remove from heat. Add 1 tbs butter and Parmesan cheese. Stir until incorporated.