Smoked Chicken And Winter Squash Blintzes

Name: Smoked Chicken And Winter Squash Blintzes
Ingredients: 1 medium winter squash, such as butternut, halved lengthwise and seeded (about 1 1/2 pounds); 1 tablespoon extra-virgin olive oil; 2 leeks, white and tender green, thinly sliced; 1/2 pound smoked chicken breast, skinned and cut into 1/3 -inch dice; 1 tablespoon maple syrup, plus more for serving; 1 teaspoon thyme; Salt and freshly ground pepper; 3/4 cup all-purpose flour; 1/4 teaspoon salt; 4 large eggs, lightly beaten; 1 tablespoon finely chopped flat-leaf parsley; 1 cup milk; 5 tablespoons unsalted butter, 3 melted; Sour cream or yogurt, for serving