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Steak Diane Casserole

Savory Steak Diane Casserole Your New Comfort Food Favorite

This Steak Diane Casserole offers comforting, heartwarming flavors and is a crowd-pleaser for all ages.
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Prep Time 30 minutes
Cook Time 6 hours
Creamy Finish Time 30 minutes
Total Time 7 hours
Servings: 6 servings
Course: Dinner
Cuisine: American
Calories: 450
Ingredients Equipment Method Nutrition Notes

Ingredients
  

For the Casserole
  • 1.5 pounds beef cubes Use tender cuts like sirloin or flank steak.
  • 2 tablespoons olive oil Can substitute with vegetable oil.
  • 1 medium onion Yellow or white onions work well.
  • 2-3 cloves garlic Freshly minced.
  • 8 ounces mushrooms Button or cremini mushrooms.
  • 2 tablespoons Dijon mustard Substitute with whole grain mustard if desired.
  • 2 tablespoons Worcestershire sauce
  • 2 cups beef broth Low-sodium versions available.
  • 1 cup heavy cream Can use half-and-half as a lighter alternative.
  • 1 tablespoon cornstarch Optional thickener.
  • 1 tablespoon fresh parsley Chopped, for garnish.
For Serving
  • 1 serving mashed potatoes Ideal base for the casserole.
  • 1 serving rice Alternative base.
  • 1 serving buttered egg noodles Another great option to complement the dish.

Equipment

  • skillet
  • Slow Cooker

Method
 

Step-by-Step Instructions
  1. In a large skillet, heat 2 tablespoons of olive oil over medium-high heat. Add 1.5 pounds of beef cubes and sear for 3-4 minutes until browned.
  2. In the same skillet, add the chopped onion and minced garlic, stirring for 3-4 minutes until translucent.
  3. Add 8 ounces of sliced mushrooms and cook for about 5 minutes until tender.
  4. Stir in 2 tablespoons of Dijon mustard and 2 tablespoons of Worcestershire sauce. Mix well.
  5. Pour in 2 cups of beef broth and season with salt and pepper. Simmer for 5 minutes.
  6. Transfer mixture to a slow cooker, add the seared beef and coat well. Cook on low for 6-8 hours.
  7. About 30 minutes before serving, stir in 1 cup of heavy cream and thicken with a cornstarch slurry if needed.
  8. Ladle into bowls or over a base of mashed potatoes, rice, or egg noodles, and garnish with parsley.

Nutrition

Serving: 1servingCalories: 450kcalCarbohydrates: 30gProtein: 35gFat: 25gSaturated Fat: 12gPolyunsaturated Fat: 1gMonounsaturated Fat: 8gCholesterol: 120mgSodium: 800mgPotassium: 600mgFiber: 3gSugar: 2gVitamin A: 2IUVitamin C: 5mgCalcium: 50mgIron: 3mg

Notes

This casserole can be stored in the fridge for 3 days or frozen for up to 3 months. Reheat with a splash of broth or cream to restore texture.

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