Preheat the oven to 425 degrees. Line a baking sheet with parchment paper.
Slice the top and bottom of the squash, then place it on a flat end and slice it in half with a sharp knife.
Scoop out the seeds with a spoon, then slice each half into slices about 1 inch thick.
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 that onto the top side of the slices.
Place in the oven and bake for 20-25 minutes, carefully flipping halfway through baking, 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.