Butternut Squash with custard

1 small butternut squash, halved length-wise and seeded (about 1 1/2 pounds) 1 1/2 cups whole milk 4 large egg whites 2 large eggs 1/4 cup maple syrup 3[...]

1 lb butternut squash, halved lengthwise and seeded cooking spray 1 teaspoon butter 2 cups leeks , finely chopped 1/2 tablespoon sugar 1/3 teaspoon salt 1/8[...]