To make fresh pumpkin puree, choose a firm-fleshed cooking pumpkin. (Avoid large field pumpkins used for jack-o'-lanterns as they are too watery.) Cut in half through the stem end and place, cut sides down, on a baking pan lined with parchment paper. Bake in a preheated 350deg.F oven until a skewer pierces the flesh, about 25 minutes. Scoop out the seeds, scrape the flesh from the skin and puree in a food processor. The puree should be the consistency of canned pumpkin. If it is too thin, cook over low heat until thickened. Freeze leftover puree for up to 3 months.