Butternut Squash with custard

3 cups butternut squash peeled and cut into 1/2 inch cubes * 1 x nonstick cooking spray * 1/2 teaspoon salt divided 1 1/4 teaspoons olive oil 1 1/4 cups onion[...]

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[...]