Preheat the oven to 425 degrees. Line a baking sheet with parchment paper.
Cut and discard the top & bottom of the squash. Place it on a flat end and slice it in half.
Scoop out the seeds with a spoon, then slice each half into about 1-inch-thick pieces.
Add the squash to a large mixing bowl along with the oil, butter, Parmesan, garlic, basil, thyme, oregano, sea salt, and freshly cracked black pepper to taste.
Toss the ingredients together until evenly coated.
Place the squash slices on the baking sheet. If there's extra Parmesan herb mixture in the bowl, press it onto the top side of the slices.
Bake for 20-25 minutes, and gently flip halfway through, until soft and lightly golden on top.
Remove from the oven and transfer it to a serving platter.
Sprinkle with parsley and serve immediately. Enjoy.