Butternut Squash without cornmeal fish

1 sheet of frozen puff pastry, thawed (from a 17.3-ounce package) 1 large egg beaten with 1 teaspoon water 12 1/8"-thick rounds peeled butternut squash kosher[...]

8 ounces butternut squash, peeled and chopped into 1-inch cubes 1/2 cup water salt , to taste 8 ounces green beans , trimmed and chopped into 1-inch pieces 1[...]