Spaghetti Sqlaw

Name: Spaghetti Sqlaw
Ingredients: Olive oil, for drizzling; One 4-pound spaghetti squash, halved and seeds scooped out; Salt and freshly ground black pepper; 1/2 cup mayonnaise; 2 tablespoons apple cider vinegar; 1 tablespoon stone-ground mustard; 1 teaspoon celery seed; 1 teaspoon Sriracha, such as Kikkoman; 1 teaspoon sugar