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Caramelized Vidalia Onion Casserole is rich, decadent, and filling. This meatless family dinner recipe is made in one pan making clean-up wonderfully short!

Caramelized Vidalia Onion Casserole

A meatless casserole, Caramelized Vidalia Onion Casserole is rich, decadent, and filling. t's great as an entree or side.
Course Side Dish
Cuisine American/Southern
Keyword onions, pasta
Prep Time 15 minutes
Cook Time 1 hour
Total Time 1 hour 15 minutes
Servings 8 servings
Calories 424kcal
Author Paula Jones


  • 1 tablespoon canola oil
  • 2 to 3 large Vidalia onions or other sweet onion
  • 1 tablespoon Worcestershire sauce
  • 1/2 teaspoon ground pepper
  • 1 teaspoon salt or to taste)
  • 1 teaspoon garlic minced
  • 1 cup chicken broth low sodium
  • 8 ounces pasta any shape
  • 1 bay leaf
  • 1/4 teaspoon dried thyme or 1/2 tablespoon fresh thyme
  • 1/4 teaspoon fresh rosemary minced (just of pinch of dried rosemary)
  • 1 cup heavy cream
  • 1 pinch red pepper flakes
  • 6 ounces gruyere shredded
  • 6 ounces fontina shredded


  • In a large pot, cook pasta according to directions on package.
  • Drain and set pasta aside.
  • Turn pot to low and add 2 tablespoon canola oil.
  • Add onions and cook on low 30 to 40 minutes until caramelized. Stir frequently.
  • Add 1 cup chicken broth, Worcestershire sauce, salt, pepper, bay leaves, thyme, garlic, rosemary, and red pepper flakes.
  • Cook until liquid has reduced by half.
  • Stir in cream, pasta and cheeses.
  • (Casserole can be covered and refrigerated at this point and baked later if desired.)
  • Bake at 400 20 to 30 minutes or until hot and cheese is melted.


  • optional, 1 cup button mushrooms, sliced
  • Recipe from Paula @CallMePMc.com All images and content are copyright protected.


Calories: 424kcal | Carbohydrates: 29g | Protein: 17g | Fat: 27g | Saturated Fat: 15g | Cholesterol: 89mg | Sodium: 390mg | Potassium: 255mg | Fiber: 2g | Sugar: 6g | Vitamin A: 833IU | Vitamin C: 7mg | Calcium: 378mg | Iron: 1mg