1. Preheat oven to 500Â°F. Spray baking sheet with nonstick cooking spray and set aside.
2. In medium mixing bowl combine scallops and buttermilk, turning to coat; let stand at room temperature for 15 minutes to marinate.
3. In small mixing bowl combine bread crumbs and thyme. Dredge each scallop in bread crumb mixture, coating both sides, and arrange scallops on prepared baking sheet.
4. Bake, carefully turning scallops over until browned on all sides, about 5 minutes.