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French onion beef meatballs topped with Gruyère cheese in a savory sauce

French Onion Style Beef Meatballs

A comforting dish featuring juicy beef meatballs, melted Gruyère cheese, and a rich slow-cooked onion gravy, perfect for family gatherings or cozy nights in.
Prep Time 20 minutes
Cook Time 6 hours
Total Time 6 hours 20 minutes
Course Dinner, Main Course
Cuisine Comfort Food, French
Servings 6 servings
Calories 450 kcal

Ingredients
  

For the Meatballs and Gravy

  • 500 g beef meatballs (frozen or homemade) Savory foundation for the dish.
  • 2 large onions, thinly sliced Caramelizes beautifully.
  • 3 cups beef broth Creates a deliciously smooth gravy.
  • 1 packet onion soup mix Enhances flavor of the gravy.
  • 1 tablespoon Worcestershire sauce Adds a touch of umami.
  • 1 teaspoon garlic powder Enhances aroma and taste.
  • 1 dash black pepper For flavor enhancement.
  • 1 cup shredded Gruyère or Swiss cheese For a creamy finish.
  • 1 tablespoon cornstarch (optional) For thickening gravy.
  • 2 tablespoons water (for cornstarch slurry) To mix with cornstarch.
  • 1 tablespoon fresh parsley For garnish.

Instructions
 

Caramelizing the Onions

  • Melt two tablespoons of butter in a large pan over medium heat.
  • Add thinly sliced onions and cook for 15-20 minutes until caramelized and golden brown.

Preparing the Slow Cooker

  • Transfer the caramelized onions to your slow cooker.
  • Add beef meatballs, beef broth, onion soup mix, Worcestershire sauce, garlic powder, and black pepper.
  • Gently stir to ensure even distribution.

Cooking Time

  • Cover the slow cooker and set it on LOW for 5-6 hours or HIGH for 2-3 hours.
  • Allow meatballs to absorb the flavorful broth.

Thickening the Gravy (Optional)

  • For a thicker gravy, mix cornstarch with water to form a slurry.
  • Stir this mixture into the slow cooker during the last 30 minutes of cooking.

Adding the Cheese

  • About 10 minutes before serving, sprinkle shredded cheese over the meatballs.
  • Cover the slow cooker to melt the cheese.

Final Touches

  • Garnish with freshly chopped parsley before serving.
  • Serve with mashed potatoes, rice, or crusty bread.

Notes

Consider sautéing minced garlic with onions for added flavor. Personalize meatballs with herbs like thyme or rosemary. For a low-carb meal, serve over zucchini noodles or spaghetti squash.
Keyword Beef Meatballs, Cheesy Dish, Comfort Food, French Onion, Slow Cooker