Peel the squash, cut it in half lengthwise; remove and discard seeds. Cut the squash into 1/2-inch cubes.
Heat oven to 350°F. Place sliced bread on ungreased cookie sheets; lightly brush with 1 tablespoon of the oil. Bake 6 to 9 minutes or until crisp. Cool completely.
Meanwhile, in a large bowl, mix squash, onion and remaining 2 tablespoons oil. Sprinkle with red pepper flakes, salt and pepper; toss to coat. Spread on ungreased baking sheet. Bake 15 minutes; stir. Bake 15 to 20 minutes longer or until browned and tender.
Meanwhile, in a medium bowl, beat goat cheese, cream cheese and whipping cream with mixer on high speed until smooth. Spread goat cheese mixture on top of each baguette slice and top with squash mixture. Garnish with fresh parsley, if desired.