Butternut Squash without marshmallow allspice

3 1/2 pounds butternut squash peeled and cut in 1/4-inch-thick slices (about 6 cups) 1 bunch spinach fresh, washed and stemmed, optional 2 tablespoons butter,[...]

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[...]