2 pounds butternut squash, peeled, seeded, and cut into 3/4-inch pieces
2 medium cooking apples, peeled, cored, and cut into 3/4-inch pieces
1 cup coarsley chopped red onion
1 tablespoon vegetable oil
1/2 teaspoon salt
1/4 teaspoon ground black pepper
1/2 cup crumbled blue cheese or shredded white cheddar cheese (2 ounces)
2 tablespoons snipped fresh sage or 2 teaspoons dried sage
12 sheets frozen phyllo dough (14x9-inch rectangles), thawed
Nonstick cooking spray
1/2 cup finely chopped walnuts, toasted
Preheat oven to 400 degrees. For squash filling, in a 15x10x1-inch baking pan combine squash, apples, and onion. Drizzle with oil and sprinkle with salt and pepper; toss gently to coat. Bake about 35 minutes or until vegetables are tender and light brown. Stir in cheese and sage; set aside.
Line a baking sheet with parchment paper or foil; grease foil (if using). Set baking sheet aside. Unfold phyllo dough.
For each phyllo dough, place 1 sheet of phyllo dough on a work surface. (While you work, keep the remaining phyllo covered with plastic wrap to keep it from drying out.) Coat phyllo sheet with cooking spray. Using half of the walnuts, sprinkle some of the walnuts over phyllo sheet. Repeat with 5 more phyllo sheets, cooking spray and walnuts. Spread half of the squash filling along 1 short side of the phyllo stack to within ½ inch of the edges. Starting from the filled edge, roll up phyllo.
Lightly coat each phyllo roll with cooking spray . Using a serrated knife, gently cut each roll into 4 portions. Place portions, standing upright, on the prepared baking sheet. Bake about 15 minutes or until golden brown.