Fall 2022: I spotted this display at the Bryant Street Market. An image search found American Turks Turban Squash Gourd (Cucurbita Maxima) and you can get ten seeds @$17 to grow your own.
Says they are edible and here’s a recipe link for Turban Squash soup
“ Turban squash encompasses a group of winter squashes known for their turban-like cap or acorn on the blossom end, and these squashes are predominately used as an ornamental to showcase its bright colors, patterns, and unusual shape. There are many varieties of Turban squash inclu Turk’s Turban, French Turban, Mexican hat, Turk’s Cap, American Turban, and Marina di Chioggia.” From the Specialty Produce website