Heavenly Onion Casserole

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Servings: 6 Difficulty: Intermediate
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A creamy, cheesy baked dish featuring caramelized onions and mushrooms on crispy French bread.
Heavenly Onion Casserole recipe image
Heavenly Onion Casserole recipe image
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Heavenly Onion Casserole

Author: chefs-mate Cooking Method: , Cuisine: Courses:
Difficulty: Intermediate
Servings: 6 Calories: 2157.6

Description

This comforting casserole transforms simple pantry staples into a rich, savory meal. Layers of sweet, caramelized onions and earthy fresh mushrooms are nestled beneath a creamy sauce made from condensed mushroom soup and evaporated milk. The dish is built on a foundation of sturdy French bread slices, which absorb the flavorful liquid while maintaining a satisfying texture. Topped with generous amounts of Swiss cheese, it bakes into a golden, bubbly masterpiece. It is an excellent choice for a cozy weeknight dinner or a hearty vegetarian main that feeds a crowd with minimal effort. The combination of soft vegetables, crisp bread, and melted cheese creates a perfect balance of textures and deep, umami flavors that everyone will enjoy.

Ingredients

Directions

  1. Preheat oven to 350ðF (175ðC) and grease a 2-quart casserole dish.
  2. In a large skillet, melt butter over medium heat.
  3. Add sliced sweet onions and fresh mushrooms to the skillet; sauté until onions are soft and translucent, about 8-10 minutes.
  4. Spread the sautéed onion and mushroom mixture evenly into the bottom of the prepared casserole dish.
  5. In a medium bowl, combine the cream of mushroom soup, evaporated milk, and soy sauce; stir until smooth.
  6. Pour the soup mixture evenly over the vegetables in the casserole dish.
  7. Arrange the slices of French bread in a single layer on top of the soup mixture.
  8. Top the bread slices with the thin slices of Swiss cheese.
  9. Cover the dish tightly with foil and refrigerate for at least 4 hours to allow the bread to absorb the flavors.
  10. Remove from refrigerator and bake uncovered for 30 minutes, or until the cheese is melted and bubbly and the top is golden brown.
  11. Let stand for 5 minutes before serving to allow the casserole to set slightly.

Nutrition Facts

Servings 6

Amount Per Serving
Calories 2157.6kcal
% Daily Value *
Total Fat 137.2g212%
Saturated Fat 80.9g405%
Cholesterol 374.7mg125%
Sodium 1452.3mg61%
Total Carbohydrate 137.4g46%
Dietary Fiber 9.7g39%
Sugars 33.5g
Protein 103.0g206%

* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.

Keywords: onion casserole, mushroom soup, swiss cheese, french bread, vegetarian main, comfort food, baked casserole, easy dinner, cheese bake, family meal, sauteed onions, creamy sauce, hearty supper, homestyle cooking, budget friendly, make ahead, oven baked, rich flavors, potluck dish
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