Bon Appetit, October 1998
Bring 7 cups water and rice to boil in heavy large saucepan. Reduce heat; cover and simmer until rice is tender, about 1 hour. Drain. Transfer to large bowl.
Preheat oven to 375deg. Oil baking sheet. Place squash, cut side down, on sheet. Bake until tender, about 40 minutes. Cool. Using spoon, scoop out pulp from squash, leaving 1/4" thick shell; reserve shells. Transfer pulp to medium bowl. Reduce oven temperature to 350deg.
Melt butter in large nonstick skillet over medium heat. Add onions; saute until very tender, about 15 minutes. Add sage; stir 2 minutes. Add rice, squash pulp and lemon juice; stir until mixed, breaking up squash pulp into smaller pieces. Mix in 1/2 cup cranberries, 1/2 cup hazelnuts and parsley. Season with salt and pepper.
Divide rice mixture among reserved squash shells. Place in roasting pan. (Can be made 6 hours ahead. Cover and chill.)
Bake squash until filling is heated through, about 25 minutes. Sprinkle with remaining 3 tablespoons cranberries and 3 tablespoons hazelnuts.