Caramelized Onion Pasta Gratin
  1. In a Dutch oven, sauté onions in 2 tablespoons olive oil in batches over medium heat until tender, adding more oil if necessary.
  2. Reduce heat to medium-low.
  3. Cook sautéed onions for 20–25 minutes or until golden brown; stirring occasionally.
  4. Remove onions from pan when desired color is reached; set aside.
  5. Preheat oven to 350 degrees.
  6. Cook pasta according to package directions until al dente; drain and set aside.
  7. In Dutch oven, melt butter over medium-low heat.
  8. Whisk in flour until smooth.
  9. Gradually whisk in milk and beef broth.
  10. Bring to a boil; cook and whisk for 2 minutes, or until thickened.
  11. Reduce heat to low; gradually stir in 1 cup of Swiss cheese until melted.
  12. Stir in reserved onions and pasta.
  13. Remove from heat.
  14. Season with salt and pepper to taste.
  15. Spoon pasta mixture into a greased 13×9-inch baking dish.
  16. Place bread, thyme, and remaining Swiss cheese in a food processor; cover and process until coarse crumbs.
  17. Drizzle with remaining 2 tablespoons olive oil; toss to combine.
  18. Sprinkle over pasta mixture.
  19. Bake for 15–20 minutes, or until crumbs are golden brown.