Preheat oven to 450*
In a small bowl, mix all ingredients for aioli and chill in the refrigerator until serving.
Cut squash in halves and scoop out seeds. Slice into 1/2' rounds and place into a large bowl. Drizzle with olive oil, and sprinkle with seasoning, lightly toss with your hands to coat. Add grated Romano and toss again.
Place squash on a parchment lined sheet pan in a single even layer, scraping any left-over cheese from mixing bowl onto the squash. Roast for 20-25 minutes, flipping halfway through. Remove from oven and let rest for 5 minutes before serving with the chilled aioli.