Rio Grande Pueblo peoples traditionally served a variant of this sweetbread to parties of nut-pickers in September when piñon nuts were being picked from the mountain slope trees. Families would (and some still do) camp for many weeks in traditional areas reserved to clans. In the recipe you can use either cooking-type pumpkin (these have necks and thick, meaty bodies, not like jack o' lantern pumpkins) or a sweet bright orange squash, like butternut.