Butternut Squash Gratin without neck breadcrumbs

2 1/2 pounds butternut squash 2 tablespoons butter 2 tablespoons olive oil or canola oil 4 cloves garlic minced, normal size, or 2 large cloves, or to taste 4[...]

5 cups cubed peeled butternut squash (1/2-inch cubes) 1 teaspoon olive oil 1 1/2 cups thinly sliced leeks 2 cups cubed peeled braeburn apples (1/2-inch cubes)[...]

1 butternut squash (about 1 3/4 lb.) 1 tablespoon olive oil 1 tablespoon fresh sage , chopped 1/4 teaspoon kosher salt (coarse) 1/4 teaspoon fresh ground[...]