Harvest Hash

INGREDIENTS

• 1/2 teaspoon salt
• 1/2 pound butternut squash, peeled and cut into 1/2-inch cubes (1 1/4 cups)
• 3 shallots (6 ounces), halved lengthwise and thinly sliced crosswise (1 1/3 cups)
• 3 garlic cloves, chopped
• 1/4 teaspoon black pepper
• 1 russet (baking) potato (1/2 pound)
• 1/2 stick (1/4 cup) unsalted butter, cut into pieces
• 1 1/2 to 2 teaspoons chopped fresh sage
• 3 medium parsnips (1/2 pound total), peeled and cut into 1/2-inch cubes (1 1/4 cups)