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Close-up of French Onion Meatball Melts with melted cheese and fresh parsley garnish.

French Onion Meatball Melts

Juicy meatballs, caramelized onions, and melty Gruyere cheese on a toasted baguette – the ultimate comfort food!
Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Course Main Dish
Cuisine American
Servings 4 sandwiches
Calories 600 kcal

Equipment

  • Cast Iron Skillet
  • Baking Sheet

Ingredients
  

Meatballs

  • 1.5 lb ground beef
  • 1/2 cup panko breadcrumbs for a crispy texture
  • 1/4 cup milk adds moisture
  • 1 egg binds everything together
  • 1/2 cup grated Parmesan cheese adds umami
  • 1 tsp salt
  • 1/2 tsp black pepper
  • 2 Tbsp olive oil for browning

Onion Gravy

  • 2 large onions thinly sliced
  • 1 cup beef broth adds depth
  • 1 Tbsp Worcestershire sauce for umami-rich flavor
  • 1 Tbsp butter optional, for richness

Assembly

  • 1 cup shredded Gruyere cheese or Swiss cheese
  • chopped parsley for garnish
  • toasted baguettes or hoagie rolls

Instructions
 

  • In a large bowl, mix together the ground beef, panko breadcrumbs, milk, egg, Parmesan cheese, salt, and black pepper.
  • Roll into 1-inch meatballs.
  • Heat olive oil in a cast iron skillet over medium heat. Brown the meatballs on all sides for about 5 minutes. Remove and set aside.
  • In the same pan, melt butter and cook sliced onions over medium heat, stirring occasionally, until deeply caramelized (about 20-25 minutes).
  • Add beef broth and Worcestershire sauce, scraping up browned bits. Simmer for 5 minutes.
  • Add browned meatballs back to the pan, tossing to coat. Simmer for another 5 minutes until cooked through.
  • Preheat broiler.
  • Place toasted baguettes on a baking sheet and spoon meatballs with onion mixture onto each piece.
  • Top with shredded Gruyere cheese and broil for 2-3 minutes until bubbly and golden.
  • Sprinkle with chopped parsley and serve warm.

Notes

For extra flavor, add a splash of balsamic vinegar to the onions while caramelizing!
Keyword French onion soup, Lipton’s onion soup mix recipes, meatball melts