Roasted Squash And Polenta Torta with Red Onion Marmalade
Serves 10 to 12 1 2- to 3-lb. kabocha squash, halved and seeded; or butternut squash, halved, seeded, and sliced crosswise 1½ inch thick 2 Tbs. extra-virgin olive oil; more for the baking sheet and pan 5 cups homemade or store-bought vegetable broth 2½ cups coarse cornmeal polenta, such...